Exchange #5.5.0 access denied

Posted on 2007-08-02
Last Modified: 2010-04-18
Our local users are having trouble sending to specific email addresses with the following error message:

"Your message did not reach some or all of the intended recipients.

      Subject:  RE: SUBJECT

      Sent:     8/1/2007 10:02 AM

The following recipient(s) could not be reached:

      '' on 8/1/2007 10:03 AM

            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.

            < #5.5.0 smtp;550 access denied R>"

Any ideas what this access denied refers too?
Question by:vdubbs
    1 Comment
    LVL 104

    Accepted Solution

    That is a problem with the domain you are trying to email. They have probably tried to secure something or are using new antispam tools. Nothing you can do about it, the other side needs to fix it.
    You can see if it is something that is affecting all senders by putting the domain in to one of the online testing tools such as


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