Cannot access email on mobile devices

For the second time in a few weeks, I cannot access my Xfinity email on my mobile devices. (I'm fine on my laptop, and I can access my email via Chrome on my phone--but that is totally inconvenient). The first time access to my email returned after 24 hours or so. This time, nothing. I rebooted my mobile devices and tried again to get my email, with no luck. This morning I removed the email app on my Samsung phone and when I reinstalled it, I tried to set up my email--with no luck. The error message said, "Couldn't verify account: Your IP address is blocked by the email server. Contact your email service provider for help." I cannot get to any of the sites that the FAQs tell me to go to re: blocked IP addresses! The Xfinity app is of no help since I don't have an account with Xfinity. (We moved to a place without Xfinity, but I kept my email.)

I also tried the manual set-up mode, following the settings listed on the Xfinity sites. No joy. I could not add it either to my Outlook email app. Also, my email settings DO state that I allow access via third-party programs. Since I no longer have Xfinity internet, I cannot put in a trouble ticket. Help?! Or is my only solution to get rid of my Xfinity email?