Problems with paperless billing email

Somewhere around 6/22/2026,  I am no longer receiving the paperless billing email from at least two sources.   I suspect this is something to do with the migration to Yahoo, since both failed during the same time period.

One of the senders is [Edited: "Personal Information"] 
''.

The problem is that any error messages would be sent back to the email inbox of the billing system, not to me.

Is there any way for Comcast IT support to see what the errors are or do we need to work only with the billing people?