Block *

SMTP Proxy

Few days ago there were many host mail server from outside send to my SMTP proxy such as,,…

how to block like wide * ? or any advice ?

You may blacklist a whole domain, see

From the docs:

It’s possible to create an ‘Allow’ or ‘Block’ rule even for a complete email domain, not just for a single email address : you just need to specify the desired domain (e.g. :