The “smartctl” daemon (Self-Monitoring, Analysis and Reporting Technology) is warning of impending disk failure:
Device: /dev/bus/4 [megaraid_disk_01], SMART Failure: DATA CHANNEL IMPENDING FAILURE DATA ERROR RATE TOO HIGH
Month: October 2021
2 ISPs, 1 routing table
Fixing email by rewriting routing table
Rewrite address (To:) of message in postfix’s email queue
If an email gets stuck in postfix’s deferred queue, there are a couple of ways to deal with it.