Re: Error 550 5.7.1. messsage refused
From: T. Uranjek (toniuranjek_at_hotmail.com)
Date: 02/13/05
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Date: Sun, 13 Feb 2005 09:22:52 +0100
Rich, thanx for your answers,
Diagnostic Logging, MSExchangeTransport, Categorizer and SMTP protocol
logging levels are now set to maximum, all others from Transport service to
minimum.
There were two attempts to send this message, and communication beetwen
servers was established in both caseses.
We don't use any relay servers, this is one and only Exchange server behind
firewall box with SMTP traffic completly open. This firewall is not Pix. I
found KB article which explains similar behaviour if you are using Exchange
behind Pix.
I've double cheked our MX record with www.dnsreport.com and www.dnsstuff.com
and I couldn't find any problem. We were using ISP's mail server to serve as
backup, if our connection would drop. Second MX record was removed from DNS
on 1st of February, one day after log I've posted was made.
Now that I'm looking thoroughly at SMTP log, I see that with all refused
messages DATA part is missing, and all these messages were sent from abroad.
Is this communication problem?
TIA
T.
"Rich Matheisen [MVP]" <richnews@rmcons.com.NOSPAM.COM> wrote in message
news:qv7t01tlshtp1pogvqn03cekrla3avk30l@4ax.com...
> "T. Uranjek" <toniuranjek@hotmail.com> wrote:
>
>>Thanx for your answer. I have been collecting SMTP logs for couple of
>>weeks.
>>Now what's wierd: this is the portion of log when message gets rejected
>>with
>>550 5.7.1.!
>>
>>31.1.2005 16:55:43 21*.8*.4*.** smtp.domainserver.com 192.168.0.20 EHLO
>>+smtp.domainserver.com 250 0 234 25 0 SMTP
>>31.1.2005 16:55:43 21*.8*.4*.** smtp.domainserver.com 192.168.0.20 MAIL
>>+FROM:<sender@sendersdomain.com> 250 0 39 36 0 SMTP
>>31.1.2005 16:55:43 21*.8*.4*.** smtp.domainserver.com 192.168.0.20 RCPT
>>+TO:<recipient@ourdomain.com> 250 0 34 31 0 SMTP
>>31.1.2005 16:55:45 21*.8*.4*.** smtp.domainserver.com 192.168.0.20 QUIT
>>smtp.domainserver.com 240 2203 101 5236 2078 SMTP
>>
>>This message was never received by Categorizer, there is nothing from
>>sender@sendersdomain.com in Message Tracking. This has happened for the
>>seventh time in two weeks.
>>
>>How would one inspect message flow from SMTP to Categorizer, diagnostic
>>logging does not help, for now.
>
> What diagnostic logging have you turned on? Transport|Categorizer and
> Transport|SMTP would be a start.
>
>>I will double check AV software settings, any other ideas?
>
> Any event sink you may have installed is suspect. But I'd be looking
> harder at that SMTP protocol log. Are you sure there aren't mutiple
> sessions from the same server co-mingled in it? The log doesn't
> include the message-id (or even the file name assigned by the SMTP
> process) so it's not easy to keep one session separated from another.
>
> The fact that the transmitting server receives a 550 5.7.1 and you're
> seeing a normal 240 status just isn't right. If it was your server
> sending that status you'd see it in the SMTP protocol log. Do you use
> a relay server of any kind? Does your MX record point to your server
> or to your ISP's server?
>
> --
> Rich Matheisen
> MCSE+I, Exchange MVP
> MS Exchange FAQ at http://www.swinc.com/resource/exch_faq.htm
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