SMTP Relay for monitoring - custom domain - Lemmy.world

Hi there, what SMTP relay’s / services do you use or can recommend for sending monitoring alerts. I’m running a few services, but mostly all my custom scripts, and tasks are configured to sent an e-mail if something goes “off-script”. Before I used my gmail account - but I’m in the middle of migrating away, and my requirements have evolved. I’ve searched but I haven’t found anything good. Services like Mailgun, Mailtrap etc. are nice - but their bundle’s are a bit much for my taste. The service/ relay should meet the following requirements. - bring your own domain (use your own domain/ or sub-domains as sender address) - must have DKIM (anything else is not a serious service!) - support SMTP via TLS - support multiple SMTP clients, with each different credentials/ secrets - Allow custom header/ envelope changes At the moment I’m looking at Amazon SES, because I don’t expect a lot of messages (I had 3 alerts in the last 1,5 yrs).