I'm running postfix on my Debian box configured to use [mail.sonic.net]:587 as the relayhost. Starting December 3rd, I began getting a lot of "(unable to look up host mail.sonic.net: Name or service not known)" errors in the logs, and queued mail backing up locally. Absolutely nothing about my local mail software or configuration changed since last summer, nor has my password on Sonic, and I can successfully lookup mail.sonic.net and connect to it on port 587 via telnet.
Did anything change on the Sonic end that would be causing this, before I start trying to generate more verbose logs to better diagnose what's happening locally?
Did anything change on the Sonic end that would be causing this, before I start trying to generate more verbose logs to better diagnose what's happening locally?