A fix has been implemented and we are monitoring the results.
Posted May 11, 2021 - 11:09 CEST
Update
We are continuing to work on a fix for this issue.
Posted May 11, 2021 - 11:08 CEST
Identified
Due to a customers compromised mailbox spam has been detected. We have informed the user and disabled to mailbox. De-listing is now requested for our mail relay servers.