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View the content of a message in the Postfix queue

harmless rootMaildebian, ubuntu
Adjust the values, the command updates live
root@server
postcat -q 4F2A31C0E12

Prints a message from the queue including envelope data, headers and body. The queue ID comes from postqueue -p. Useful for checking whether a suspicious message is spam and which script or account submitted it (for example via the X-PHP-Originating-Script header).

Also searched as

  • read email in mail queue
  • is this queued mail spam
  • check headers of queued email

Related one-liners

All in Mail

Delete a single message from the Postfix queue

#postsuper -d 4F2A31C0E12
destructiveMail

Delete all deferred mail from the Postfix queue

#postsuper -d ALL deferred
destructiveMail

Flush the Postfix queue and retry delivery now

$postqueue -f
cautionMail

Show the Postfix mail queue

$postqueue -p
harmlessMail

Delete all mail from one sender in the Postfix queue

#postqueue -p | awk -v s="info@example.com" '/^[0-9A-Za-z]/ && $7 == s {print $1}' | tr -d '*!' | postsuper -d -
destructiveMail

Find a hacked mail account by its SMTP logins

#grep -o "sasl_username=[^ ,]*" /var/log/maillog | sort | uniq -c | sort -rn | head -20
harmlessMail

Read first, then run.

The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

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  • Understand what a command does before running it, and check every placeholder.
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