25 - SMTP

perl swaks.perl --ehlo "target_mx" --from "target_from_email" --to "target_email" --header "Subject: Test" --body "hey, let's go party!" --attach "/home...zip" --attach-name "lo.zip" --server "target_mx"

https://jetmore.org/john/code/swaks/files/swaks-20201014.0/swaks