Web Shield is blocking email / Phishing warning

Free antivirus

I am using an online email interface “Atmail 7” provided by by internet provider.

Recently I cannot open any emails. Each attempt at opening is blocked by the “Web Shield” that includes some sort of phishing warning.

I am familiar with basic procedures to avoid common phishing so this seems somewhat unnecessary, but I have not figured out how to open emails without disabling the “Web Shield”, which seems worse than any phishing risk.

Can someone help me fix this?

https://www.bishopfox.com/news/2017/06/atmail-7-stored-xss-vulnerability/

Might be why.