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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US>Dear all,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I have a mail server based on a
CentOS 5.3 machine with postfix.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Most of our users are on LDAP (on
localhost) but we also have some local users and we are using PAM for
authentication.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Sometimes emails are not delivered to an
user (happens either with users on LDAP or local users on shadow) with error
“unknown user” (sometimes the error comes from smtpd and sometimes from
procmail when writing to an users’ folder):<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>-----<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Apr 23 16:00:37 mail postfix/smtpd[6707]:
D62A676856C: reject: RCPT from unknown[116.23.241.165]: 550 5.1.1
<xxxxx@astro.up.pt>: Recipient address rejected: User unknown in local
recipient table; from=<DianncartePickens@sunshinemillions.com> to=< xxxxx@astro.up.pt
> proto=SMTP helo=<b826affb8c4a402><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>-----<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>May 4 05:53:08 mail
postfix/local[13781]: E33F776882D: to=<xxxxx@astro.up.pt>, relay=local,
delay=0.03, delays=0.01/0/0/0.02, dsn=5.1.1, status=bounced (user unknown.
Command output: procmail: Unknown user "xxxxx" )<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>-----<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>It seems that sometimes the system
(postfix? procmail? ???) can’t retrieve user information.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>A</span><span
lang=EN-US>ny ideas on what might be causing this?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thanks!<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Cheers,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas'>Manuel
Monteiro<o:p></o:p></span></p>
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