Not recieving email from halifax.co.uk
One of my banks in the UK, Halifax has sent me a letter saying their email is not getting through. Sure enough, I have never had an email from them since a switched to Mailbox.org a few months ago.
They have the correct alias which is set up correctly in Mailbox and I receive email from Amazon to the same alias. I've checked Halifax.co.uk on MXTools and cannot see anything obviously wrong there but I'm no expert.
Spam settings are default, except the last setting is set to flag and send to inbox.
Anyway, any pointers would be much appreciated. Many thanks in advance.