On 2024-06-14 Brian Lowe wrote:
Agreed. I wonder if Shaw allows inbound connections on SMTP? If so, I could probably set postfix to answer on inbound and accept mail. Outbound pretty much has to go through Shaw, since they block outbound SMTP at their border routers. The same is likely true for MTS.
Yes, that's the main (big!) impediment to self-hosting that Big Internet (TM) has imposed on us plebes. Shaw does allow inbound 25, but for outgoing you have to smarthost through Shaw (which works ok for low volume non-spammy-looking things), or get an outside smarthost relay. That can be a box you control or friend's you make a deal with, a 3rd party smarthost you pay tiny amounts of $ for, or some cloud VPS thing you run either a bit, some or all your mail-ish daemons on.
Adam's book recommendation sounds really good, too. And I wonder what he will recommend for solving that smarthost issue.
But hey, if anyone decides to go down these route(s), figuring out how to do all the DKIM/SPF/DMARC stuff has already been solved for you in the MUUG presentation 2 months ago :-) check out the slides!