On 23/8/24 06:23, Andrew Hodgson via Blind-sysadmins wrote:
I would say though running your own mail gateway these days is fairly arduous with respect to getting your email accepted at the other end. Most businesses I work with are sending out through a SaaS solution, even if they need to get the mail processed using an on-prem style gateway appliance, they send it out through the SaaS service as the last hop.
Interestingly, I'm not doing that, and I haven't noticed any delivery issues recently. It's a small server primarily used by me. The one instance in the last year or so was most likely due to my provider's network (linode.com) being added to a block list, which they claimed had a poor reputation - and they weren't going to pay the block list company to have the listing removed. However, they contacted the email service provider that was rejecting my messages, and the issue was fully resolved within an hour or two, with no recurrence since then. I do have my SPF, DKIM and DMARC records in place, with outbound messages signed. I check the DMARC reports from time to time in case of issues. For anyone planning to do likewise, my understanding is that the IP address reputation of your hosting or network provider is important, and it may take a while for your domain name to acquire a good reputation with recipients. I found it useful to test my mail server with the service at internet.nl, which verifies a variety of configuration details.