Run an email server? Use hotmail.co.uk?

[lovingboth]

It looks like for some strange reason, around the 16th April at least one server at hotmail.co.uk started to use ancient data rather than current MX records when deciding where to send emails.

So they've been sending some (but not all) email from two people with hotmail.co.uk accounts to my old server rather than the current one, even though I changed servers (and the various DNS records) about a year ago.