Not receiving emails on Comcast IMAP email accout

@XfinityOrlandoM​ I'm sorry but this answer wasn't really helpful.  My husband spent all day Monday on the phone with Comcast support (ticket number [Edited: "Personal Information"]).  That ticket was escalated up through 4th level support and up to engineering.  On Tuesday morning, my two email accounts miraculously started working again.  We assumed that engineering had magically fixed things between Monday evening and Tuesday morning when my email started working once again.  It worked all day on Tuesday, Wednesday, and Thursday.  Come Friday morning, it quit working once again.  My husband spent the entire morning today trying to get through the security people.  Even though they had the old ticket, they couldn't seem to understand what needed to be done.  Even though we've tried and failed to access my email accounts using both the Mac mail client as well as the Mac Mail program, they insisted we load the "Google Web Brower".  I assume they meant Chrome.  Of course that's nonsense.  Chrome won't do anything differently than the Mac Mail app and the Safari browser won't do.  Anyway, since the person I was talking to wouldn't offer any help unless I loaded Chrome on my machine (which I won't do.  I don't trust Google as far as I can throw them), my husband asked to be connected to their supervisor.  After being on hold, waiting for over thirty minutes.  We gave up.  All we managed to do was get a new ticket opened ([Edited: "Personal Information"]).  We're open to any reaonable help or suggestions.  It's just insane that we have to keep going through things like this with Comcast.  If someone would like to connect us with help, my husband's phone number is in both the mentioned tickets.  Thanks!

Been there, done that.  Cleared cache and cookies when this first cropped up on Monday.  And it doesn't matter what device we use to access her email accounts.  Whether it's from her phone or her computer, it's the same story.  Also, we had the problem on Monday.  Engineering evidently corrected the issue Monday night/Tuesday morning.  Everything worked fine Tuesday, Wednesday, and Thursday.  Friday the problem is back.  As they managed to confirm on Monday, emails are being received by the Xfinity/Comcast mail servers (reference ticket IH265574558), they're just not being transferred to her appropriate inbox.  As a side note, these responses in this thread normally would be going to her associated email address.  But nada.  They're not coming in.  The only reason we saw your response is because we're parked on the forum to see what can be done to fix this issue.

Okay, thank you for the additional information user_w2wezp. We can certainly attempt some additional troubleshooting, or researching this. I will just need some additional information.

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We're currently working with support via chat.  The problem seems to have been corrected.  Support has set a reminder to check back with us on Wednesday to make sure it stays fixed.  At this time, you can close this thread.