On 9/5/23 09:29, Andrew Hodgson via Blind-sysadmins wrote:
Honestly its really hard work running a mail server these days that isn’t one of the big companies.
I've noticed the same, although I have succeeded so far in not ending up on a block list with any of the large providers. I suspect intermittent delivery issues from this address, but I don't have any clear evidence that it's a result of being hosted on my own server. My other e-mail address is with Microsoft 365, which gives better fault tolerance and spam filtering than I can implement myself. On the other hand, Microsoft 365's spam filter generates false positives as well, sometimes for legitimate mailing list traffic from a large provider - resolved for now by placing the affected addresses on an allow list.