Google Group emails not being received

I had this issue a year or two ago -- I belong to a Google Group and my Comcast email is not receiving any of the group emails.

Comcast did something to fix it before, but it has re-surfaced.  I have not received group emails for about a month, but randomly, I received one today.

There is something between Google Groups and Comcast that occasionally doesn't work.

Comcast -- please fix it !

Thank you!