From: Alexandros G. Fragkiadakis (alfragecon.soc.uoc.gr)
Date: Tue Sep 11 2007 - 06:12:22 CDT

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hi all,

the last few days i can see hundreds of entries like the following in the
log file:

Sep 10 14:42:42 hermes postfix/smtpd[8924]: warning: dict_ldap_lookup:
Search error 34: Invalid DN syntax
Sep 10 14:42:42 hermes postfix/smtpd[8924]: NOQUEUE: reject: RCPT from
localhost[127.0.0.1]: 451 4.3.0 <megan>: Temporary lookup failure;
from=<mylist-bouncesxxx.xxx.xxx.xx> to=<megan> proto=ESMTP
helo=<xxx.xxx.xxx.xx>

In the email account i use for administration purposes i get:

Transcript of session follows.

 Out: 220 xxx.xxx.xxx.xx ESMTP Postfix
 In: ehlo xxx.xxx.xxx.xx
 Out: 250-hermes.soc.uoc.gr
 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-bouncesxxx.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 (the software i use for mailing lists) tries to
send emails to the non-existent user "megan".

Any ideas?

Thanks in advance,

Alexandros

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