Use backup MX as spam filter?
I am lately seeing a huge increase in incoming spam on some mail accounts I take care of for a friend of mine.
As the spam filtering on the provider's side seems to be pretty subpar, I was thinking about getting that incoming mail filtered before getting them handed over to the existing mail server.
Kinda like this services claim to do, i.e.:
This way the existing accounts would stay in place and no mails have to be moved to another service. The result I would hope for would be better filtering (maybe even blacklisting) and the availability of some sort of a "quarantine".
I am wondering if something like this could be achieved with mailcow in a "Backup MX" setup, while beeing more of the only receiving server that forwards the mails after passing the filter.
Do you guys have any thoughts about this or maybe even know other providers that you already tried out? Would be quite happy to hear about it!