feat: add reply to list support

[MxFlorin]

Fixes

Added replyToList and test unit.

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
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] 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.

[MxFlorin]

Can any code reviewer to have a look to this PR? Many Thanks

[ShaharGrauman]

Any news about this valuable request? @SendGridDX @thinkingserious @motdotla @martyndavies

[motdotla]

I work @dotenvx these days - https://dotenvx.com.