Xfinity marks obviously legitimate email as spam

Many have complained about how much spam Comcast/Xfinity lets through, and this is remains a major problem. 

But on the flip side, their system routinely treats obviously legitimate email as spam. This includes email from:

- major companies,

- people on threads you've started, and

- people you communicate with regularly. 

Other companies do not have this problem, so the buck stops with Comcast/Xfinity's utterly incompetent engineering.

It's also noteworthy that Xfinity has so little regard for their email service that this forum does not even contain a top level posting category for email.