What Antivirus and Antimalware can I install?

Can you recommend an antivirus and antimalware that I can install on my Debian 11 with Hestiacp 1.5.7

Thanks

Clamav is already installed. Just use it to scan.

Yes, right choice.

Warning: If you are want to use ClamAV, your server needs a minimum of 2GB Ram support.

Is it possible to scan only e-mail?

Websites cannot be scanned, right?

By default only email is scanned.

If you want to scan websites you will have to get the definitions for php files and scan them manually

Check here as well