[earthboundkid]

FWIW, I haven't done that kind of setup for years because modern iOS/macOS does email server discovery, where you enter "[e-mail]" and then it does discovery and figures out the right imap.example.com:587 etc for you by looking at DNS.

[tlamponi]

Yes, such things are nice. The well-known URI [0] system is also sometimes used for this, at least there's one entry for Thunderbird under the "autoconfig/mail" subdirectory. Having some of those auto-config methods available for git send-mail could be nice, as it would lower the barrier a bit further, even if most devs are probably able to check their SMTP endpoint and port.

[0]: https://en.wikipedia.org/wiki/Well-known_URI