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new file mode 100644
index 0000000..782e002
--- /dev/null
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@@ -0,0 +1,9 @@
+
+�

+java:S1104"TMake multiple a static final constant or non-public and provide accessors if needed.(���������
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+java:S1104"WMake cleanDomain a static final constant or non-public and provide accessors if needed.(���
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new file mode 100644
index 0000000..1e6d955
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+++ b/.idea/sonarlint/issuestore/5/a/5a503c465e2e403dbd4c3fe2906c7cecc8e13602
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+
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+java:S1192v"IDefine a constant instead of duplicating this literal "^\\d{5}$" 5 times.(����
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index 33e91a7..fbb632e 100644
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+6src/main/java/io/github/multiform_validator/Utils.java,5\8\5879b52636e240d2cfcbd5e54543d3959f957811
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+?src/main/java/io/github/multiform_validator/EmailValidator.java,f\9\f9465a1df802c670887a6edc9706fd150e19342b
\ No newline at end of file
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index 33e91a7..fbb632e 100644
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@@ -20,4 +20,12 @@ G
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-	README.md,8\e\8ec9a00bfd09b3190ac6b22251dbb1aa95a0579d
\ No newline at end of file
+	README.md,8\e\8ec9a00bfd09b3190ac6b22251dbb1aa95a0579d
+f
+6src/main/java/io/github/multiform_validator/Utils.java,5\8\5879b52636e240d2cfcbd5e54543d3959f957811
+j
+:src/main/java/io/github/multiform_validator/Validator.java,5\a\5a503c465e2e403dbd4c3fe2906c7cecc8e13602
+n
+>src/main/java/io/github/multiform_validator/CnpjValidator.java,8\8\8821b29c537b8a99cd1bc3d5df88d632f6f5d314
+o
+?src/main/java/io/github/multiform_validator/EmailValidator.java,f\9\f9465a1df802c670887a6edc9706fd150e19342b
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diff --git a/.idea/uiDesigner.xml b/.idea/uiDesigner.xml
new file mode 100644
index 0000000..2b63946
--- /dev/null
+++ b/.idea/uiDesigner.xml
@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Palette2">
+    <group name="Swing">
+      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
+      </item>
+      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.svg" removable="false" auto-create-binding="false" can-attach-label="true">
+        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
+        <initial-values>
+          <property name="text" value="Button" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="RadioButton" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="CheckBox" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="Label" />
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+      </item>
+      <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
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+      </item>
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+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
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+      </item>
+      <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
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+      </item>
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+      </item>
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+      </item>
+      <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.svg" removable="false" auto-create-binding="true" can-attach-label="false">
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+          <preferred-size width="150" height="50" />
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+      </item>
+      <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.svg" removable="false" auto-create-binding="true" can-attach-label="false">
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+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSlider" icon="/com/intellij/uiDesigner/icons/slider.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSeparator" icon="/com/intellij/uiDesigner/icons/separator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JProgressBar" icon="/com/intellij/uiDesigner/icons/progressbar.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1">
+          <preferred-size width="-1" height="20" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JScrollBar" icon="/com/intellij/uiDesigner/icons/scrollbar.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
+      </item>
+    </group>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 145d885..566f37c 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -5,11 +5,26 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="22c9667a-e00d-49e2-aa6d-da35dd213aa7" name="Changes" comment="">
-      <change beforePath="$PROJECT_DIR$/.idea/sonarlint/issuestore/1/d/1d784fce58c3719506730fb9749600554125b511" beforeDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/sonarlint/issuestore/5/8/5879b52636e240d2cfcbd5e54543d3959f957811" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/sonarlint/issuestore/5/a/5a503c465e2e403dbd4c3fe2906c7cecc8e13602" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/sonarlint/issuestore/8/8/8821b29c537b8a99cd1bc3d5df88d632f6f5d314" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/sonarlint/securityhotspotstore/5/8/5879b52636e240d2cfcbd5e54543d3959f957811" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/sonarlint/securityhotspotstore/5/a/5a503c465e2e403dbd4c3fe2906c7cecc8e13602" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/sonarlint/securityhotspotstore/8/8/8821b29c537b8a99cd1bc3d5df88d632f6f5d314" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/uiDesigner.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/sonarlint/issuestore/d/c/dcba94fd99e9396082d1fedd3522764f78825365" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/sonarlint/issuestore/d/c/dcba94fd99e9396082d1fedd3522764f78825365" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/sonarlint/issuestore/index.pb" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/sonarlint/issuestore/index.pb" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/sonarlint/securityhotspotstore/1/d/1d784fce58c3719506730fb9749600554125b511" beforeDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/sonarlint/securityhotspotstore/index.pb" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/sonarlint/securityhotspotstore/index.pb" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/multiform-validator.iml" beforeDir="false" afterPath="$PROJECT_DIR$/multiform-validator.iml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/io/github/multiform_validator/CnpjValidator.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/github/multiform_validator/CnpjValidator.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/io/github/multiform_validator/EmailValidator.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/github/multiform_validator/EmailValidator.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/io/github/multiform_validator/Utils.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/github/multiform_validator/Utils.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/CnpjValidatorTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/CnpjValidatorTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/CpfValidatorTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/CpfValidatorTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/EmailValidatorTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/EmailValidatorTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/UtilsTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/UtilsTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/ValidatorTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/ValidatorTest.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -70,7 +85,7 @@
     &quot;settings.editor.selected.configurable&quot;: &quot;preferences.pluginManager&quot;
   }
 }</component>
-  <component name="RunManager" selected="Application.Main">
+  <component name="RunManager">
     <configuration name="Main" type="Application" factoryName="Application" nameIsGenerated="true">
       <option name="ALTERNATIVE_JRE_PATH" value="corretto-11" />
       <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="true" />
diff --git a/README.md b/README.md
index da85831..5c27341 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ import io.github.multiform_validator.Validator;
 import io.github.multiform_validator.EmailValidator;
 import io.github.multiform_validator.CpfValidator;
 import io.github.multiform_validator.CnpjValidator;
+import io.github.multiform_validator.Utils;
 
 public class Main {
     public static void main(String[] args) {
@@ -32,6 +33,13 @@ public class Main {
 
         System.out.println(Validator.isAscii("foo")); // true
         System.out.println(Validator.isAscii("foo©")); // false
+        
+        System.out.println(Utils.getOnlyEmail("This is an example test1@email.com bla yes my friend loren ipsun")); // test1@email.com
+        System.out.println(Utils.getOnlyEmail("This is an example bla yes my friend loren ipsun")); // null
+        // With options
+        Utils.GetOnlyEmailOptionsParams options = new Utils.GetOnlyEmailOptionsParams();
+        options.multiple = true;
+        System.out.println(Utils.getOnlyEmail("This is an example test1@example.com bla test2@example.com yes yes", options)); // [test1@example.com, test2@example.com]
     }
 }
 ```
diff --git a/multiform-validator.iml b/multiform-validator.iml
index d55c872..c26c2c5 100644
--- a/multiform-validator.iml
+++ b/multiform-validator.iml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module version="4">
   <component name="SonarLintModuleSettings">
-    <option name="uniqueId" value="87b94a39-8d05-4761-9afa-26b585acd5d2" />
+    <option name="uniqueId" value="c5c54ae9-3385-42e1-a3bd-58c981c046ca" />
   </component>
 </module>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index e22c09e..c236d24 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>io.github</groupId>
     <artifactId>multiform-validator</artifactId>
-    <version>0.0.1</version>
+    <version>0.0.2</version>
 
     <name>Multiform Validator</name>
     <description>
@@ -31,6 +31,7 @@
         <maven.compiler.target>1.8</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
+
     <dependencies>
         <dependency>
             <groupId>org.jetbrains</groupId>
diff --git a/src/main/java/io/github/multiform_validator/CnpjValidator.java b/src/main/java/io/github/multiform_validator/CnpjValidator.java
index 72ac807..58586f8 100644
--- a/src/main/java/io/github/multiform_validator/CnpjValidator.java
+++ b/src/main/java/io/github/multiform_validator/CnpjValidator.java
@@ -48,6 +48,11 @@ public static boolean cnpjIsValid(String cnpj) {
             return false;
         }
 
+        // Check if all digits are the same
+        if (cnpjClean.chars().distinct().count() <= 1) {
+            return false;
+        }
+
         // Convert the string to an array of integers
         final int[] cnpjArray = cnpjClean.chars().map(Character::getNumericValue).toArray();
 
diff --git a/src/main/java/io/github/multiform_validator/EmailValidator.java b/src/main/java/io/github/multiform_validator/EmailValidator.java
index 96907a5..a54fcfb 100644
--- a/src/main/java/io/github/multiform_validator/EmailValidator.java
+++ b/src/main/java/io/github/multiform_validator/EmailValidator.java
@@ -15,7 +15,7 @@ public static boolean isEmail(String email) {
             throw new NullPointerException("Email cannot be null");
         }
 
-        final Pattern startsWithSpecialChar = Pattern.compile("^[^a-zA-Z0-9]");
+        final Pattern startsWithSpecialChar = Pattern.compile("^[^a-zA-Z]");
 
         if (startsWithSpecialChar.matcher(email).find()) {
             return false;
diff --git a/src/main/java/io/github/multiform_validator/Utils.java b/src/main/java/io/github/multiform_validator/Utils.java
index e3ec88c..194be56 100644
--- a/src/main/java/io/github/multiform_validator/Utils.java
+++ b/src/main/java/io/github/multiform_validator/Utils.java
@@ -8,26 +8,26 @@ private Utils() {
         throw new IllegalStateException("Utility class");
     }
 
-    private static final List<String> CleanAfterDefaultDomain = Arrays.asList(
+    private static final List<String> GetOnlyEmailCleanAfterDefaultDomain = Arrays.asList(
             ".br", ".io", ".pt", ".us", ".org", ".com"
     );
 
-    public static class OptionsParams {
+    public static class GetOnlyEmailOptionsParams {
         public Boolean multiple = false;
         public Object cleanDomain = false;
         public Boolean repeatEmail = false;
     }
 
-    private static final OptionsParams defaultOptionsParams = new OptionsParams();
+    private static final GetOnlyEmailOptionsParams getOnlyEmailDefaultOptionsParams = new GetOnlyEmailOptionsParams();
 
-    public static Object getOnlyEmail(String text, OptionsParams options) {
+    public static Object getOnlyEmail(String text, GetOnlyEmailOptionsParams options) {
         if (options == null) {
-            options = defaultOptionsParams;
+            options = getOnlyEmailDefaultOptionsParams;
         }
 
-        Boolean multiple = options.multiple != null ? options.multiple : defaultOptionsParams.multiple;
-        Object cleanDomain = options.cleanDomain != null ? options.cleanDomain : defaultOptionsParams.cleanDomain;
-        Boolean repeatEmail = options.repeatEmail != null ? options.repeatEmail : defaultOptionsParams.repeatEmail;
+        Boolean multiple = options.multiple != null ? options.multiple : getOnlyEmailDefaultOptionsParams.multiple;
+        Object cleanDomain = options.cleanDomain != null ? options.cleanDomain : getOnlyEmailDefaultOptionsParams.cleanDomain;
+        Boolean repeatEmail = options.repeatEmail != null ? options.repeatEmail : getOnlyEmailDefaultOptionsParams.repeatEmail;
 
         Pattern emailPattern = Pattern.compile("[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}");
         Matcher matcher = emailPattern.matcher(text);
@@ -42,7 +42,7 @@ public static Object getOnlyEmail(String text, OptionsParams options) {
         }
 
         if (cleanDomain != null && !cleanDomain.equals(false)) {
-            List<String> domainsToClean = cleanDomain instanceof List ? (List<String>) cleanDomain : CleanAfterDefaultDomain;
+            List<String> domainsToClean = cleanDomain instanceof List ? (List<String>) cleanDomain : GetOnlyEmailCleanAfterDefaultDomain;
 
             List<String> cleanedEmails = new ArrayList<>();
             for (String email : matches) {
diff --git a/src/test/java/CnpjValidatorTest.java b/src/test/java/CnpjValidatorTest.java
index 90f7159..98c1ddd 100644
--- a/src/test/java/CnpjValidatorTest.java
+++ b/src/test/java/CnpjValidatorTest.java
@@ -37,4 +37,28 @@ void testInvalidLengthCnpj() {
         assertFalse(cnpjIsValid("12.345.678/0001-900"));
         assertFalse(cnpjIsValid("123456780001900"));
     }
+
+    @Test
+    void testInvalidCnpjWithLetters() {
+        assertFalse(cnpjIsValid("12.345.678/0001-9A"));
+        assertFalse(cnpjIsValid("1234567800019A"));
+    }
+
+    @Test
+    void testInvalidCnpjWithSpecialCharacters() {
+        assertFalse(cnpjIsValid("12.345.678/0001-9@"));
+        assertFalse(cnpjIsValid("1234567800019@"));
+    }
+
+    @Test
+    void testInvalidCnpjWithSpaces() {
+        assertFalse(cnpjIsValid("12.345.678/0001-9 "));
+        assertFalse(cnpjIsValid("1234567800019 "));
+    }
+
+    @Test
+    void testAllDigitsAreEqual() {
+        assertFalse(cnpjIsValid("00.000.000/0000-00"));
+        assertFalse(cnpjIsValid("00000000000000"));
+    }
 }
\ No newline at end of file
diff --git a/src/test/java/CpfValidatorTest.java b/src/test/java/CpfValidatorTest.java
index 8f9102f..48064f1 100644
--- a/src/test/java/CpfValidatorTest.java
+++ b/src/test/java/CpfValidatorTest.java
@@ -37,4 +37,34 @@ void testInvalidLengthCpf() {
         assertFalse(cpfIsValid("1234567890"));
         assertFalse(cpfIsValid("111444777350"));
     }
+
+    @Test
+    void testInvalidCpfWithLetters() {
+        assertFalse(cpfIsValid("1234567890A"));
+        assertFalse(cpfIsValid("1114447773A"));
+    }
+
+    @Test
+    void testInvalidCpfWithSpecialCharacters() {
+        assertFalse(cpfIsValid("1234567890@"));
+        assertFalse(cpfIsValid("1114447773@"));
+    }
+
+    @Test
+    void testInvalidCpfWithSpaces() {
+        assertFalse(cpfIsValid("1234567890 "));
+        assertFalse(cpfIsValid("1114447773 "));
+    }
+
+    @Test
+    void testAllDigitsAreEqual() {
+        assertFalse(cpfIsValid("00000000000"));
+        assertFalse(cpfIsValid("11111111111"));
+    }
+
+    @Test
+    void testInvalidCpfWithSpecialCharactersAndLetters() {
+        assertFalse(cpfIsValid("1234567890@"));
+        assertFalse(cpfIsValid("1114447773A"));
+    }
 }
\ No newline at end of file
diff --git a/src/test/java/EmailValidatorTest.java b/src/test/java/EmailValidatorTest.java
index 194c7ac..a307da4 100644
--- a/src/test/java/EmailValidatorTest.java
+++ b/src/test/java/EmailValidatorTest.java
@@ -6,71 +6,60 @@
 class EmailValidatorTest {
     @Test
     void testValidEmail() {
-        assertTrue(isEmail("test@example.com"));
-        assertTrue(isEmail("john.doe@example.com"));
+        assertTrue(isEmail("foo@bar.com"));
+        assertTrue(isEmail("Foo@Bar.com"));
+        assertTrue(isEmail("foo@bar.com.br"));
     }
 
     @Test
     void testInvalidEmail() {
-        assertFalse(isEmail("test@example"));
-        assertFalse(isEmail("john.doe@example"));
-        assertFalse(isEmail("test@example."));
-        assertFalse(isEmail("john.doe@example."));
-        assertFalse(isEmail("@example.com"));
-        assertFalse(isEmail("@example."));
-        assertFalse(isEmail("test@.com"));
-        assertFalse(isEmail("john.doe@.com"));
-        assertFalse(isEmail("test@."));
-        assertFalse(isEmail("john.doe@."));
-        assertFalse(isEmail("test@@example.com"));
-        assertFalse(isEmail("john.doe@@example.com"));
-        assertFalse(isEmail("test@example..com"));
-        assertFalse(isEmail("john.doe@example..com"));
-        assertFalse(isEmail("test@example.com."));
-        assertFalse(isEmail("john.doe@example.com."));
-        assertFalse(isEmail("test@example.."));
-        assertFalse(isEmail("john.doe@example.."));
-        assertFalse(isEmail("test@example.com.."));
-        assertFalse(isEmail("john.doe@example.com.."));
-        assertFalse(isEmail("test@example..com."));
-        assertFalse(isEmail("john.doe@example..com."));
-        assertFalse(isEmail("test@example.com.."));
-        assertFalse(isEmail("john.doe@example.com.."));
-        assertFalse(isEmail("test@example..com.."));
-        assertFalse(isEmail("john.doe@example..com.."));
-        assertFalse(isEmail("test@example.com..."));
-        assertFalse(isEmail("john.doe@example.com..."));
-        assertFalse(isEmail("test@example...com"));
-        assertFalse(isEmail("john.doe@example...com"));
-        assertFalse(isEmail("test@example.com..."));
-        assertFalse(isEmail("john.doe@example.com..."));
-        assertFalse(isEmail("test@example...com."));
-        assertFalse(isEmail("john.doe@example...com."));
-        assertFalse(isEmail("test@example.com..."));
-        assertFalse(isEmail("john.doe@example.com..."));
-        assertFalse(isEmail("test@example...com.."));
-        assertFalse(isEmail("john.doe@example...com.."));
-        assertFalse(isEmail("test@example.com...."));
-        assertFalse(isEmail("john.doe@example.com...."));
-        assertFalse(isEmail("test@example....com"));
-        assertFalse(isEmail("john.doe@example....com"));
-        assertFalse(isEmail("test@example.com...."));
-        assertFalse(isEmail("john.doe@example.com...."));
-        assertFalse(isEmail("test@example....com."));
-        assertFalse(isEmail("john.doe@example....com."));
-        assertFalse(isEmail("test@example.com...."));
-        assertFalse(isEmail("john.doe@example.com...."));
-        assertFalse(isEmail("test@example....com.."));
-        assertFalse(isEmail("john.doe@example....com.."));
-        assertFalse(isEmail("0654"));
-        assertFalse(isEmail("test"));
-        assertFalse(isEmail("john.doe"));
-        assertFalse(isEmail("test@"));
-        assertFalse(isEmail("john.doe@"));
-        assertFalse(isEmail("test@."));
-        assertFalse(isEmail("john.doe@."));
-        assertFalse(isEmail("test@.com"));
-        assertFalse(isEmail("john.doe@.com"));
+        assertFalse(isEmail("foo@bar"));
+        assertFalse(isEmail("1foo@bar.com"));
+        assertFalse(isEmail("foo@1bar.com"));
+        assertFalse(isEmail("foo@bar.1com"));
+        assertFalse(isEmail("foo.bar.com"));
+        assertFalse(isEmail("joaoaoao@gmail.com.com"));
+        assertFalse(isEmail("joao..@gmail.com"));
+        assertFalse(isEmail("joao.@gmail.com"));
+        assertFalse(isEmail("joao@@gmail.com"));
+        assertFalse(isEmail("joao@gmail..com"));
+        assertFalse(isEmail(".foo@bar.com"));
+        assertFalse(isEmail(",foo@bar.com"));
+        assertFalse(isEmail("!foo@bar.com"));
+        assertFalse(isEmail("@foo@bar.com"));
+        assertFalse(isEmail("#foo@bar.com"));
+        assertFalse(isEmail("$foo@bar.com"));
+        assertFalse(isEmail("foo@@bar.com"));
+        assertFalse(isEmail("foo@bar.com.br.br"));
+        assertFalse(isEmail("foo@bar.com.com.br.br"));
+        assertFalse(isEmail("foo@bar.com.com.br"));
+        assertFalse(isEmail("foo!@bar.com"));
+        assertFalse(isEmail("foo bar@baz.com"));
+        assertFalse(isEmail(" foo@bar.com"));
+        assertFalse(isEmail("foo@bar.com "));
+        assertFalse(isEmail("foo..bar@baz.com"));
+        assertFalse(isEmail("foo@@bar.com"));
+        assertFalse(isEmail("foo@bar..com"));
+        assertFalse(isEmail("foo..bar@baz.com"));
+        assertFalse(isEmail("foo@bar.com.."));
+        assertFalse(isEmail("foo@bar..com"));
+        assertFalse(isEmail("foo..@bar.com"));
+        assertFalse(isEmail("foo@bar..com."));
+        assertFalse(isEmail("foo..@bar..com."));
+        assertFalse(isEmail("foo@bar.com..."));
+        assertFalse(isEmail("foo@bar!com"));
+        assertFalse(isEmail("foo!@bar.com"));
+        assertFalse(isEmail("foo@bar.c"));
+        assertFalse(isEmail("foo@bar."));
+        assertFalse(isEmail("foo@bar"));
+        assertFalse(isEmail("foo@bar."));
+        assertFalse(isEmail("foo@bar.."));
+        assertFalse(isEmail("foo@bar..."));
+    }
+
+    @Test
+    void testEmptyEmail() {
+        assertFalse(isEmail(""));
     }
 
     @Test
diff --git a/src/test/java/UtilsTest.java b/src/test/java/UtilsTest.java
index 31b481d..55697bd 100644
--- a/src/test/java/UtilsTest.java
+++ b/src/test/java/UtilsTest.java
@@ -17,34 +17,30 @@ void testGetOnlyEmail() {
         assertEquals("test@example.com", Utils.getOnlyEmail("This is a sample text with email test@example.com", null));
 
         // Test with multiple emails
-        Utils.OptionsParams options1 = new Utils.OptionsParams();
+        Utils.GetOnlyEmailOptionsParams options1 = new Utils.GetOnlyEmailOptionsParams();
         options1.multiple = true;
         assertEquals(
                 new ArrayList<>(Arrays.asList("test1@example.com", "test2@example.com")),
                 Utils.getOnlyEmail("This is a sample text with emails test1@example.com and test2@example.com", options1)
         );
 
-        // Test with cleaning domain
-        Utils.OptionsParams options = new Utils.OptionsParams();
-        options.cleanDomain = true;
-        assertEquals("test@example.com.br", Utils.getOnlyEmail("test@example.com.br", options));
-
-        // Test with cleaning domain and multiple emails
-        options.multiple = true;
+        // Test with multiple emails and clean domain
+        Utils.GetOnlyEmailOptionsParams options2 = new Utils.GetOnlyEmailOptionsParams();
+        options2.multiple = true;
+        options2.cleanDomain = true;
         assertEquals(
-                new ArrayList<>(Arrays.asList("test1@example.com.br", "test2@example.com.br")),
-                Utils.getOnlyEmail("test1@example.com.br and test2@example.com.br", options)
+                new ArrayList<>(Arrays.asList("test1@example.com", "test2@example.com")),
+                Utils.getOnlyEmail("This is a sample text with emails test1@example.comAWODI test2@example.comAWDOI awwdawd", options2)
         );
 
-        // Test with repeatEmail set to false
-        options.repeatEmail = false;
-        assertEquals(Collections.singletonList("test@example.com"), Utils.getOnlyEmail("test@example.com and test@example.com", options));
-
-        // Test with repeatEmail set to false and multiple emails
-        options.multiple = true;
+        // Test with multiple emails and clean domain and repeat email
+        Utils.GetOnlyEmailOptionsParams options3 = new Utils.GetOnlyEmailOptionsParams();
+        options3.multiple = true;
+        options3.cleanDomain = true;
+        options3.repeatEmail = true;
         assertEquals(
-                new ArrayList<>(Collections.singletonList("test@example.com")),
-                Utils.getOnlyEmail("test@example.com and test@example.com", options)
+                new ArrayList<>(Arrays.asList("test1@example.com", "test1@example.com", "test2@example.com")),
+                Utils.getOnlyEmail("This is a sample text with emails test1@example.comASD test1@example.comASD blabla test2@example.com", options3)
         );
     }
 }
\ No newline at end of file
diff --git a/src/test/java/ValidatorTest.java b/src/test/java/ValidatorTest.java
index 45d1f1e..ba777f8 100644
--- a/src/test/java/ValidatorTest.java
+++ b/src/test/java/ValidatorTest.java
@@ -25,6 +25,8 @@ void testIsCEP() {
         assertTrue(Validator.isCEP("12345678"));
         assertFalse(Validator.isCEP("1234567890"));
         assertFalse(Validator.isCEP("abcdefgh"));
+        assertFalse(Validator.isCEP("1234567"));
+        assertTrue(Validator.isCEP("12345-678"));
     }
 
     @Test
@@ -71,12 +73,14 @@ void testIsNumber() {
     void testIsPortInt() {
         assertTrue(Validator.isPort(80));
         assertFalse(Validator.isPort(-1));
+        assertFalse(Validator.isPort(65536));
     }
 
     @Test
     void testIsPortString() {
         assertTrue(Validator.isPort("80"));
         assertFalse(Validator.isPort("-1"));
+        assertFalse(Validator.isPort("65536"));
         assertThrows(IllegalArgumentException.class, () -> Validator.isPort(null));
         assertThrows(IllegalArgumentException.class, () -> Validator.isPort(""));
     }
@@ -85,6 +89,7 @@ void testIsPortString() {
     void testIsPostalCode() {
         assertTrue(Validator.isPostalCode("12345"));
         assertFalse(Validator.isPostalCode("Hello World"));
+        assertFalse(Validator.isPostalCode("123456"));
         assertThrows(IllegalArgumentException.class, () -> Validator.isPostalCode(null));
         assertThrows(IllegalArgumentException.class, () -> Validator.isPostalCode(""));
     }