It figures. After doing a bunch of work to move my backup mailserver to a virtual server, it worked fine for about 10 days, and then suddenly I was seeing no incoming email in the logs. This is a sign of a problem; even when the primary server is working, spammers are always connecting to the backup (in the hopes of getting past filters).
Much testing has determined that rogers is now blocking inbound SMTP on my portion of the network (something they’ve apparently been rolling out for over a year now). The best laid plans of mice and men, and all that…
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