support send email with SMTPSSLTransport

[dongqiaoershao]

接入邮件服务发现只支持smtp（25端口），不支持smtps（465端口），估计可能会有一些使用者遇到类似的问题，故提个PR增加支持ssl方式，代码写得有点粗糙，希望该意见能得到采纳，感谢不吝赐教。

What's the purpose of this PR

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Which issue(s) this PR fixes:

Fixes #

Brief changelog

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[codecov]

Codecov Report

Attention: 21 lines in your changes are missing coverage. Please review.

Comparison is base (bc55ba6) 49.27% compared to head (2c0fe61) 49.48%.
Report is 11 commits behind head on master.

Files	Patch %	Lines
...lo/portal/spi/defaultimpl/DefaultEmailService.java	0.00%	17 Missing ⚠️
...ollo/audit/component/ApolloAuditLogApiJpaImpl.java	33.33%	1 Missing and 1 partial ⚠️
...mework/apollo/audit/aop/ApolloAuditSpanAspect.java	96.87%	0 Missing and 1 partial ⚠️
...k/apollo/portal/component/config/PortalConfig.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5018      +/-   ##
============================================
+ Coverage     49.27%   49.48%   +0.20%     
- Complexity     1889     1902      +13     
============================================
  Files           372      372              
  Lines         11538    11564      +26     
  Branches       1123     1129       +6     
============================================
+ Hits           5685     5722      +37     
+ Misses         5513     5502      -11     
  Partials        340      340              

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[nobodyiam]

As this is a new feature, please also update the CHANGES.md file.

[nobodyiam]

By the way, please sign the Contributor License Agreement (CLA) as instructed by the CLA Assistant.

[dongqiaoershao]

I have read the CLA Document and I hereby sign the CLA

[nobodyiam]

It looks like unnecessary to declare a new variable tSsl. Could we consider streamlining the code even further, as suggested below?

String protocol = useSSl ? "smtps" : "smtp";
t = (SMTPTransport) session.getTransport(protocol);

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This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 14 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[stale]

This pull request has been automatically closed because it has not had activity in the last 14 days. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!