Disclaimer: I know very little about the email protocol(s) out there.

I've implemented a poor-man's-email-to-Gitea API gateway that works alright. However, we're now getting auto replies (e.g. "I'm on vacation") to Gitea notifications from some users. I started to look into how one could best detect and filter out such auto replies. While doing this, I stumbled upon recommendations (e.g. [0], [1], and [2]) to set the email 'X-Auto-Response-Suppress' header field for outgoing messages that you don't want to be auto-replied to. AFAIU, at least Microsoft clients/servers look at these.

Q1. Is it possible to configure the email header fields for emails that Gitea sends out?

Q2. If not, if doable, may I propose that Gitea adds the X-Auto-Response-Suppress header field?

• [0]: https://success.salesforce.com/ideaView?id=08730000000ZiXoAAK
• [1]: https://www.jitbit.com/maxblog/18-detecting-outlook-autoreplyout-of-office-emails-and-x-auto-response-suppress-header/
• [2]: https://it.cornell.edu/outlook2011mac-outlook2013win-outlook2016mac-outlook2016win-outlook-web/technical-details-auto-reply