There is a problem with incoming email to UKAEA that is being investigated.

Email systems are running normally again

There has been an ongoing issue with incoming mail and outgoing mail to external addresses for several weeks
Delays are caused by a performance bottleneck due to Sophos scanning appliance at point of entry. Additional servers are being brought on line to improve the situation.

There is an ongoing issue with incoming mail and outgoing mail to external addresses
Delays start building from 8.30, reach a peak during 11-13 and then start reducing
It is under investigation with our 3rd party supplier Sophos whose system check external email

Incoming & outgoing external and none O365 emails are now functioning normally

There are still delays with none O365 email addresses (e.g. emails from external parties and also scanned jobs from printers) arriving to our inboxes and also going out to external addresses.
We are currently seeing 4000 messages queued. The issue continues to be under investigation.
Nothing is lost, just delayed so messages will eventually arrive but unfortunately not in a timely manner at present

There is still an ongoing issue with the arrival of none O365 emails arriving in inboxes
This means emails from internal colleagues should still be fine but not those from external or none O365 mailboxes, which includes scanned print jobs
A server failure alongside high volume of automated emails into the system today have been the cause
Expectation is emails should be arriving as normal by tomorrow morning

Incoming external e-mails are not being received.
This is under investigation - There are currently 1250 messages queued on Post Office (Email delivery system) awaiting to come through