I have comcast email connected to my mac mail in an imap account. I've started receiving messages from Postmaster that I'm near my quota for emails. I'm not sure why my comcast email is near quota if the deleted messages should sync. I just deleted a ton of emails from my mac mail. I don't want to have to go into the Comcast online email and delete a bunch of emails as that's why I created imap accounts. How do I lower my online Comcast email quota?
You have a 10 Gb storage limit with a Comcast account. In the webmail interface, on the Inbox page, and assuming you are in the new email format, click on the gear icon in the upper right corner of the screen. At the bottom, it will show your current storage usage. What does yours say?