Hello,
I've set up RBL rejection and suddenly found that there are
too many open relays - nearly half of our customers and
partners couldn't send mail to us.
I've opened main addresses (such as sales, contact, etc)
with recipients_reject_except, but remained with rejection
for others. The problem moved a little and now is as
follows:
As all of you know RBL rejection occurs during RCPT TO
and ends with 'User unknown':
RCPT To:<novikov@???>
550-Open relay - see
http://www.orbs.org/verify.cgi?address=194.154.71.131
550 mail from 194.154.71.131 rejected: administrative prohibition
550 <novikov@???>... User unknown
What does damn sendmail - it sends e-mail like:
Subject: Returned mail: User unknown
The original message was received at Tue, 10 Aug 1999 14:55:16 +0400
from g630.lamport.ru [194.154.71.137]
----- The following addresses had permanent fatal errors -----
<novikov@???>
----- Transcript of session follows -----
... while talking to gate.web2000.ru.:
>>> RCPT To:<novikov@???>
<<< 550-Open relay - see
http://www.orbs.org/verify.cgi?address=194.154.71.131
<<< 550 mail from 194.154.71.131 rejected: administrative prohibition
550 <novikov@???>... User unknown
The common enduser sees the subject 'User unknown' and
panics (not in UNIX concept :). Even if he tries to read the
next part he understands nothing (he doesn't know what open
relay means).
So what do I want is to NOT reject mail at SMTP time but
rather to catch it at delivery time and to generate human
readable reply containing some info from original message
(like error messages in Exim). Any suggestions?
Best regards,
Andrey mailto:scriber@webclub.ru
