hop on the lemmy admin chat on matrix and see what you get with that line, running email is not that hard, finding a clean IP can be a pain though. Thats about all these big services are gatewaying. SMTP and IMAP is not that hard to run, even easier for a small user system.
this happens all the time in email though, its not a guarantied delivery system.
it took decades for the protocol impls to smooth out.
You’re right, it isn’t a guaranteed system. This is why a lot of people and companies farm out their email to larger companies.
hop on the lemmy admin chat on matrix and see what you get with that line, running email is not that hard, finding a clean IP can be a pain though. Thats about all these big services are gatewaying. SMTP and IMAP is not that hard to run, even easier for a small user system.