[Mailman-Users] Mail Delivery System
Alexandros G. Fragkiadakis
alfrag at econ.soc.uoc.gr
Wed Sep 12 10:19:48 CEST 2007
On Tue, September 11, 2007 18:24, Mark Sapiro wrote:
> Alexandros G. Fragkiadakis wrote:
>> the last few days i get hundreds of warnings like the following:
>> Transcript of session follows.
>> Out: 220 xxx.xxx.xxx.xx ESMTP Postfix
>> In: ehlo xxx.xxx.xxx.xx
>> Out: 250-xxx.xxx.xxx.xx
>> Out: 250-PIPELINING
>> Out: 250-SIZE 20480000
>> Out: 250-VRFY
>> Out: 250-ETRN
>> Out: 250-AUTH PLAIN LOGIN
>> Out: 250-AUTH=PLAIN LOGIN
>> Out: 250-ENHANCEDSTATUSCODES
>> Out: 250-8BITMIME
>> Out: 250 DSN
>> In: mail FROM:<mylist at xxx.xxx.xxx.xx> size=1059
>> Out: 250 2.1.0 Ok
>> In: rcpt TO:<megan>
>> Out: 451 4.3.0 <megan>: Temporary lookup failure
>> In: rset
>> Out: 250 2.0.0 Ok
>> In: quit
>> Out: 221 2.0.0 Bye
>> For some reason mailman tries to send email to users like "megan". This
>> user does not even exist.
>> Do you have any ideas what can be wrong?
> First, your MTA appears to be doing DNS verifies during SMTP from
> Mailman. This is not good. See
> When your MTA receives the 'rcpt TO:<megan>' and responds with a '451',
> Mailman queues the message in it's retry queue and retries in 15
> minutes. Thus the vast number of attempts to send to 'megan'.
> The 'megan' address can come from anywhere. It is unlikely to be a list
> member, but it may be an owner or moderator. Mailman's
> bin/find-member --owner megan
> will find an owner or mmember, but not a moderator.
> More likely, this is a rejection notice in response to a non-member
> post (undoubtedly spam) to a list.
> You need to find Mailman's retry queue (normally qfiles/retry, but in
> FHS compliant RedHat /var/spool/mailman/retry). You can look at the
> entry/entries with
> bin/show_qfiles qfiles/retry/*
> which will show you the contents of the entries. From this, you can then
> determine the list and whether this is an owner or moderator or just spam
> and remove the unwanted files from the queue.
Thanks, it stopped now. Probably a spam caused this.
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