记录sendmail和procmail的通用电子邮件标识符

Question

In the processing of an in-bound email through sendmail and procmail, I am having trouble matching procmail log entries with sendmail's maillog entries. Sendmail posts the queue-id to the log.

Is there a method of sendmail adding the mail queue's "Message-queue-id" to a custom header, and then capturing it in procmailrc for its use in posting it to procmail's log output entries?

For example, we just delete mail identified by spamassassin as Spam, but can't after the fact trace it back to a sendmail log entry due to lack of common identifier.

Answer 1

I am also interested to learn how to make Sendmail add a custom header that holds only the message queue ID. Until then I help myself by parsing the Received: header that is added which shows the ID after "id". Here is a template for a Procmail recipe to extract the ID:

:0
* ^Received: .*by myserver.example.net \(.*\) with [a-z]+ id \/[0-9a-z]+
{
   QID="$MATCH"
   LOG="Message queue ID = $QID ..."
}

You might need to adjust this the actual format of the Received header that your server (=myserver.example.net) adds. The \\/ is specific to Procmail's regex parser. It does not match anything, it just splits the pattern and assigns whatever matches to its right to variable MATCH .