troubleshooting Question

SMTP Communication Problem

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CADRE308Flag for United States of America asked on
Microsoft Legacy OSExchange
6 Comments1 Solution373 ViewsLast Modified:
I recently setup an exchanger server for a customer. We were getting returned e-mail for about a day due to a reverse DNS lookup problem That has been resolved but there are a couple of mail servers the keep returning our e-mail. the most common reson is below. When i google it I get so many variation that it is hard do decipher.

There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            < #5.5.0 smtp;554 Transaction Failed Spam Message not queued.>

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