Hi list. I'm using dovecot as postfix's LDA. The version is 2.3.6. Last week some spammer set the envelope's FROM to "foo@bar@domain.com" (with two @). While trying to deliver (as this one didn't hit the spamassassin's score), dovecot said the following:
Jun 21 02:35:58 mymailserver postfix/pipe[29736]: ADA268195E: to=user@mydomain, relay=dovecot, delay=0.08, delays=0.03/0.02/0/0.04, dsn=5.3.0, status=bounced (command line usage error. Command output: lda: Fatal: Invalid -f parameter: Invalid character in path )
Which caused postfix to put it on the bounce list, but the spammer's destiny don't really exist.
I could successfully mimic the spammer using telnet and putting two @ in "mail from" address. I don't think this should be an expected behaviour, right? Or is this some config based error?
Thanks!