mail.com email blocked by virgin.
Thanks for the help, I ran several antivirus scans on both my laptops and always wise to do so, and eset antivirus picked up that my avast brower had a potentally unsafe application "variant" of-
win32/ccleaner, called avastbrowseruninstall.exe. which it deleted. I decided to remove the avast browser to be on the safe side but still have ccleaner.
It may explain why I was getting notification for along time that ccleaner was trying to make changes to the memory. but was blocked by controlled folder access.
However this did not resolve the blocking issue of the mail.com IP address by virgin, so I agree with ravenstar68 that the problem is not my own computer or my own virgin IP address, but that the virgin server is blocking the Ip address 82.165.159.131 which is mail.com server. (gmx.com isp ionos se)
This is due to a a spam listing of mail.com in spamhause.
I have tested sending emails to my virgin email from other emails- outlook.com and gmail.com and they arrive no problem in my virgin inbox.
Only mail.com can apply to delist from spamhause.
This means all emails form mail.com are blocked even if they are not spam, so virgin must have a good reason for blocking this IP address which may in the past have been used for abusive purposes/spamming etc so has a bad reputation, but so do most emails, even gmail which has lot of spam but that is not blocked.
I have not had any spam emails from mail.com myself, but have had spoofed emails from mail.com that were not from mail.com including a fake virgin bill recently, the sender address were spoofed to be mail.com but the sender IP address were not mail.com, had about 6 like that. By contrast I have had far more spam emails from outlook.com, gmail.com and hotmail.com.
alf28