It is a while since I used it but when I had a similar problem the helpline gave me a method to access the offending mail on the server where I could delete it. Sorry cannot now find the details I suggest you contact them.
AMD Radeon Adrenalin release date, new features, compatible graphics cards
Turn a photo into 16-bit pixel art
iMac Pro release date, UK price & specs
Comment suivre le parcours du père Noël ?