I've just posted the following over to the MAAF TBB forum.

Right all, big piece of work happening this weekend. Unfortunately it's going to cause some disruption to email which can't be avoided.

Basically we're moving a big chunk of the mail platform out of one data centre and into others. We've done quite a lot of work recently to move out of the data centre at Goswell Road and this work is one of the largest items left to to.

So from about 11pm on Friday night through to 9am on Saturday morning you won't be able to access your email. That means IMAP, POP3, webmail and SMTP. Email sent during this time won't be lost, it will be queued until the work is completed on Saturday morning. We'll post a service status and have a message on the phone system advising of this work.

We're sorry that we've had to cause this kind of disruption but hopefully the times we've chosen will minimise the impact for you.