My MiaB instance has been hosted at DigitalOcean for the past few years with no trouble. It looks like all inbound mail to my instance began to silently fail a few weeks back.
Testing today shows all green v56 on my status page and emails sent from my domain to a gmail account succeed. When I send mail to my domain from gmail, it just never seems to show up. The sender gmail end doesn’t get any failures I can see. Attempting a “telnet DOMAIN 25” fails from my home network out, while a “telnet DOMAIN 587” succeeds.
Does this sound like something suddenly blocking inbound port 25 at the DigitalOcean end? Any recommendations here?