[cobalt-users] Problem with POP before SMTP ?

["manitu" <manitu@xxxxxxxxxx>]

Hello all,

I have a customer who has a problem with sending mail via my server (via
STMP). Here's an excerpt from /var/log/maillog:

Mar  6 15:39:09 ns1 in.qpopper[28817]: (v2.53) POP login for "radke-sieb" at
(62.158.141.190) 62.158.141.190
Mar  6 15:39:40 ns1 sendmail[28827]: PAA28827: ruleset=check_rcpt,
arg1=<hradke-sieb@xxxxxxxxxxx>, relay=[62.158.141.190], reject=550
<hradke-sieb@xxxxxxxxxxx>... Relaying denied.  Please POP before sending.

As it seems, he does log in successfully via POP, but my server does not
accept his mail. He has tried this with several email programs, no result.

Any ideas ?

Thanks
Manuel