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Cannot Email Microsoft Webmail through Symantec Hosted Mail (Hotmail, Live, MSN etc)

Created: 30 Jun 2009 • Updated: 21 May 2010 | 2 comments


We have several clients that have been receiving errors when sending to Microsoft Web mail accounts such as Hotmail, Live and Msn.

The error they receive is ;

This message was created automatically by mail delivery software.

A message that you have sent could not be delivered to one or more recipients. This is a permanent error. The following address failed:

<>: Validating Sender

This is happening on 3 of our client sites, and to resolve we have set up temporary SMTP connectors using DNS to forward to these domains.

Is anyone else having this issue or know how to resolve it?


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TomC 2's picture

So from what I hear, there are issues sending to Hotmail right now. I am awaiting more information about a resolution, but hopefully it should be worked out soon. Keep us posted on whether this keeps happening. If it continues to be an issue please give us a call and open a case.


TomC 2's picture

So this issue should hopefully be completely resolved a little later today. Please let us know whether you are still seeing the issue by end of day today.

What happened is that a couple of IPs ended up on a block list by Hotmail. These should be removed soon.