On Fri, Jan 09, 2004 at 01:38:27AM +0800, Wong Chee How said:
> Hello all. I am running Exim 4 together with Mailscanner and ClamAV.
> Recently I am facing a problem with a valid email address (user@???)
> sending to the recipient recipient@??? . The email could not be sent
> out because the recipient's server claims that user@??? is not being
> able to resolve. The problem is that this same user@??? is able to
> send messages to other accounts. The following are the details:
>
>
>
> Connecting to earth.gems2.com.sg [160.96.65.13]:25 ... connected
> SMTP<< 220 earth.gems2.com.sg ESMTP Singapore Government E-Mail System;
> Fri, 9 Jan 2004 01:31:21 +0800 (SGT)
> SMTP>> EHLO my.hostname.com
> SMTP<< 250-earth.gems2.gov.sg Hello my.hostname.com [123.12.123.123],
> pleased to meet you
> 250-ENHANCEDSTATUSCODES
> 250-PIPELINING
> 250-8BITMIME
> 250-SIZE 30720000
> 250-DSN
> 250-ETRN
> 250-DELIVERBY
> 250 HELP
> SMTP>> MAIL FROM: SIZE=15343
> SMTP>> RCPT TO:
> SMTP>> DATA
> SMTP<< 451 4.1.8 Domain of sender address user@??? does not resolve
> SMTP<< 503 5.0.0 Need MAIL before RCPT
> SMTP<< 503 5.0.0 Need MAIL command
> SMTP>> QUIT
> LOG: MAIN
Well, it's obvious that your transaction is bogus. You have an empty
MAIL FROM: and RCPT TO:.
Furthermore, is "domain.com" YOUR domain? It IS valid, but belongs to
one of those domain name scalpers. Are you trying to be cute and use an
example? Does the REAL domain that you are testing truely exist and have
an MX record? Are the DNS servers for it up and working?
Obfuscating info is understandable, but if you do it too much or snip
too much, nobody is going to be able to help you.
