Re: Mail bounces back from Exchange ONLY

PghOPS wrote:
Yesterday, we started getting NDR's for an email address that we have emailed many times in the past without any problems.

The error is:

You do not have permission to send to this recipient. For assistance, contact your system administrator.
<funddrive.com #5.7.1 smtp;550 5.7.1 Access denied>

I have Macs that also send mail to the same user, but their email goes to our ISP directly and not through our Exchange server and their email goes through OK.

It is only the users that are sending through our Exchange server that are having a problem with this particular domain (mercercolor.com).

We are using SBS2003r2 Standard.

Sorry if this sould have been posted in the Exchange group. Let me know if I should post it there.

No, we do Exchange as well. You need them if you have a complicated setup, on something other than SBS.

Are you on a dynamic IP address? If so, it's possible that you've inherited one recently used by a spammer and now on a blacklist somewhere. Not all that likely, as most dynamic ranges are entirely on blacklists.

Something has changed, and if you haven't changed anything, it might be quickest to ask their IT department what they've done. They may have changed mail hosts or otherwise altered their method of reception.

The alternative is to enable full SMTP logging, and look at the actual message being returned by their server, which may offer more information than Exchange is giving you. If their mail is hosted by a large ISP, someone here may know which particular hoops you have to jump through to please them. If it's Yahoo, give up now and buy carrier pigeons.
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