EU mail system blocked by Hotmail

Fixed - All blocks have been lifted. (03:30 UTC — Feb 16)

Watching - mx2.de.opalstack.com was added to the block list as well, we have submitted the delisting request and are awaiting action from Microsoft. (18:36 UTC — Feb 15)

Part of our EU mail infrastructure was blocked by Hotmail. The affected servers were:

• smtp2.de.opalstack.com (outgoing mail)
• mx1.de.opalstack.com (incoming mail and forwarding)

We’ve already dealt with the issue and Microsoft have confirmed that the servers have been unblocked, but it may take a few more hours to take full effect.

We’ll update this post when we’ve confirmed that mail is no longer being blocked. (15:21 UTC — Feb 15)