Not receiving emails from a specific address, other emails from the same domain deliver fine

Just an update.  I turned off the spam filter via the advanced settings and can now see the blocked emails.  This is still an issue for our company because the emails being blocked are for a password reset on our website.  If we change the subject by just one character, the emails go through just fine.  Is there someone where who can let us know what's actually causing the block so we can fix the issue on our side?  thanks, Jon

Comcast security should be able to help with this-----------------------

Comcast Customer Security Assurance-------------------

Normal business hours (6:00 am to 2:00 am EST, 7 days a week)

1 - 888-565-4329

I'm having the same problem and Security hasn't been able to fix it yet.  I have a ticket number for the problem, get asked the same questions over and over and still no fix.  One email from a specific address that I got fine for years and now does not go to my Outlook inbox, but only to the XFin Connect spam folder.  All attempts to fix this have failed and I;m up to about 5 attempts and about 7 hours on the phone.  Its extremely frustrating.   Expeciall annoying is having to go through the phone tree every time with no direct number to reach anyone. 

This is quite discouraging to hear.  Thanks for the info and good luck!

Apparently luck and perhaps devine intervention is required as the tech folks haven't been any help so far.  Still waiting for the promised call back from my last session, which is now overdue.