That is precisely why we have users sitting on old outdated email settings, and why Virgin Media is afraid to make their servers more secure.
If you've been using the same settings for more than 10 years, then they're out of date, likewise Outlook 2010 was marked end of life by Microsoft in October last year, meaning it gets no more updates. Over time it's going to be increasingly insecure as if hackers discover new vulnerabilities, Microsoft won't patch them out.
The best solution is to export your current account as a pst file (Using File->Open and Export) then deleting the POP3 account and recreating it as an IMAP account.
Since 2015 Virgin Media hasn't actually been deleting emails when a POP3 client requests it. Rather they're just hidden from further POP3 connections, they're still available using IMAP. (incidentally, if you've been using webmail, then you've been using IMAP - the only difference is is that the IMAP client based on a remote web server rather than your own PC).
Hackers love people who feel they "are non tech", these are people who often leave default insecure passwords on routers and webcams. When you get a computer, you need to take a little time to understand some basic tech like email security.
VM's current recommended email settings are here - they're the same settings for all domains.
https://community.virginmedia.com/t5/Email/Email-settings-change/td-p/3369438
If you've got an email client such as Thunderbird - it will even autoconfigure the settings for you, as should current versions of Outlook too.
Tim
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