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Find permanently rejected emails in the mail log

harmless rootMaildebian, ubuntu
Adjust the values, the command updates live
root@server
grep "status=bounced" /var/log/maillog | tail -n 20

Lists the last 20 permanently failed deliveries. At the end of each line, the remote server’s response is shown in parentheses, for example an unknown recipient, a full mailbox or a rejection due to a blacklist, SPF or DKIM. If the same reasons pile up across different recipients, the problem is usually on your own server.

Also searched as

  • emails are being rejected
  • undeliverable message cause
  • server blacklisted emails bounce back

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