feat: add reply to list support

[MxFlorin]

Fixes

This PR add reply_to_list support to the library.

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license
• [x] I have made a material change to the repo (functionality, testing, spelling, grammar)
• [x] I have read the Contribution Guidelines and my PR follows them
• [x] I have titled the PR appropriately
• [x] I have updated my branch with the main branch
• [n/a] I have added tests that prove my fix is effective or that my feature works
• [ n/a] I have added the necessary documentation about the functionality in the appropriate .md file
• [x ] I have added inline documentation to the code I modified

If you have questions, please file a support ticket.

[JoyceBabu]

I have a project requiring multiple reply-to addresses. Is there any update on this PR?