Whenever I send an email to a Comcast.net address from my office 365 account it is received as Spam. Messages to any 0ther domain work as they should.
Of course recipients do not always look at the spam folder and complain they have not received the message. I obviously cannot ask every recipient who has a Comcast address to get another address or turn Spam filtering off.
Using my comcast.net address as a test even when I say "not spam" the next mesage sent is treated as spam.
If I turn Spam filtering off at Comcast i receive the mesage.
I have an outstanding ticket with Microsoft. They have spent 4 weeks on the issue with nearly daily contact. Is there anything Comcast can do to help resolve this issue?
If @ComcastAntiSpam or another employee doesn't help you here, Comcast Security Assurance may be able to tell you what the problem is. You can reach them at 1-888-565-4329 (from https://internetsecurity.xfinity.com/help/report-abuse/). Note that this is NOT one of the general customer service numbers. The first-line reps there are sometimes not very helpful, so be persistent, and keep at them until you get a satisfactory resolution.
Do you have a signature set up in Office 365?
Microsoft have finally resolved problem. They wouldn't say waht they did. I know we chnaged DNS settings SPF and DKIM. Sory there is no more information