Yahoo’s mail servers which handle email for yahoo.co.uk (and possibly other EU domain suffixes) appear to have gone offline a couple of hours ago.

There is no word from yahoo! on the cause or whether the outage is planned or not but ESP’s and bulk mailers should be aware that you will likely build up large queues on your MTA’s and these should be monitored. This is not an issue with your deliverability but instead an outage.

The following servers are affected:

yahoo.co.uk.            449     IN      MX      10 mx2.mail.eu.yahoo.com. – 77.238.177.142
yahoo.co.uk.            449     IN      MX      10 mx1.mail.eu.yahoo.com. – 217.12.11.35

We will update this post again when the servers return.