[fetchmail-users] fetchmail doesn't delete mail on 501 response - mail piles up

[John F. <jo...@mi...>]

I use fetchmail 6.2.3 passing mail onto postfix via smtp.
Occasionally, I get a malformed email in my isp
mailbox with an envelope from address like this
peter@61.172.247.54.  That is unacceptable to
postfix which gives a 501 response straight after
MAIL FROM

This is part of the SMTP session:

 In:  MAIL FROM:<peter@61.172.247.54> SIZE=240722
 Out: 501 Bad address syntax
 In:  RSET
 Out: 250 Ok

However the mail stays on the pop server and mail just
piles up there until I enter and cancel it manually. Once
I cancel that mail, everything proceeds ok. I'm not interested
in the contents of the message (it originates from a worm)
but I don't like the need for manual intervention to get
things unblocked.

This is what fetchmail logs
Jun 21 18:18:47 turate fetchmail[1145]: 1 message for
isp...@ng... at pop.ngi.it (240722 octets).
Jun 21 18:18:47 turate fetchmail[1145]: reading message
isp...@ng...@pop.ngi.it:1 of 1 (240722 octets)
Jun 21 18:18:48 turate fetchmail[1145]:  flushed
Jun 21 18:18:48 turate fetchmail[1145]: client/server protocol error while
fetching from pop.ngi.it
Jun 21 18:18:48 turate fetchmail[1145]: Query status=4 (PROTOCOL)
Jun 21 18:18:56 turate fetchmail[1145]: sleeping at Mon Jun 21 18:18:56 2004


Here's fetchmailrc

set daemon 300
set postmaster fet...@mi...
set no bouncemail
set no spambounce
set syslog

poll "pop.ngi.it"
protocol pop3 interval 1 no envelope
username "isp...@mu..."
password "xxxxxxx"
is loc...@mi... here fetchall
smtphost mail.michaweb.net
antispam 501

Any ideas while fetchmail cannot delete the message?

Thanks,
John