" Just this week I had huge problems with an expected email not reaching either of my gmail or outlook inboxes. It just never came, despite the sender insisting they sent it."
That's been the opposite problem for me. I can see my email leaving my client, see it hitting my SMTP server, and I can see Gmail accepting it. The client cannot find the emails. Not in their Spam folder either. I have no issues sending to my test Gmail account or my friends, but new people? Forget it. Google simply loses the email. I"ve tried to contact them to no avail (no surprise) and the usual answer I get from others is "well, just use gmail. nobody self hosts anymore."
That's been the opposite problem for me. I can see my email leaving my client, see it hitting my SMTP server, and I can see Gmail accepting it. The client cannot find the emails. Not in their Spam folder either. I have no issues sending to my test Gmail account or my friends, but new people? Forget it. Google simply loses the email. I"ve tried to contact them to no avail (no surprise) and the usual answer I get from others is "well, just use gmail. nobody self hosts anymore."