How to block a tld

[vsupport]

This morning one of our users started getting thousands of mail from multiple domains @ .ru

What is the best way to block them

We tried blocking domain.ru but the domain name was generated probably by a script

ie a.ru b.ru c.ru etc etc etc

Thanks

 

[hata_ph]

check out the tutorial on mail filter

https://forum.proxmox.com/threads/mail-filter-example.71904/