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Sender Denied Error in Exchange 2000

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TB0NE

MIS
Apr 19, 2002
25
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I am running Exchange 2000 with the latest service packs.

I am having trouble receiving email from 1 domain and only under certain circumstances. The scenario is as follows:

We have an ASP in Florida that hosts our HR database. When we need support from them we email to hostingsupport@domain.com. This is a generic email repository that is reviewed by support personnel at their site. Once a support person takes the call they reply from their email address (not hostingsupport but rather 'techname@domain.com').

Under this scenario, the technician receives a response of:

Fatal error sending message: Permanent error with transmission: 554 5.1.0 Sender Denied.

If an email is sent directly to the technicians email address and not 'hostingsupport@domain.com', the tech's reply message is delivered properly.

I can only duplicate this problem with this domain and only under the above scenario. However, I must be able to exchange messages with this company using the 'hostingsupport' method because that is their standard support protocol.

Fact: I am not relaying.
Fact: I am not using any filters under 'Message Delivery'.
Fact: I am not blocking the domain, the sending IP, nor am I using a blacklist.
Fact: The sending email server is using Lotus Notes 6.0

I ran a log file for the SMTP service and logged the transaction. It is as follows:

SMTPSVC1 LIBERTY2 192.168.1.2 0 EHLO - +xxxxxxxx.ourdomain.com 250 0 330 25 0 SMTP - - - -
SMTPSVC1 LIBERTY2 192.168.1.2 0 MAIL - +FROM:<xxxxxx@theirdomain.com> 250 0 60 57 0 SMTP - - - -
SMTPSVC1 LIBERTY2 192.168.1.2 0 RCPT - +TO:<xxxxxxxx@ourdomain.com> 250 0 38 35 0 SMTP - - - -
SMTPSVC1 LIBERTY2 192.168.1.2 0 QUIT - xxxxxxxx.ourdomain.com 0 657 71 3707 219 SMTP - - - -

Notice the pattern of EHLO, MAIL, RCPT, QUIT.

Successfull messages will read; EHLO, MAIL, RCPT, DATA, QUIT

Unfortunately this log does not identify the specific reason for the aborted transaction. It simply states that the transaction ended.

I played with diagnotic logging but could not find any good information on which services or catagories I should monitor. Does anyone know what services and catagories I should inspect?

Any other suggestions would be greatly appreciated.

Thank you!
 
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