Using rspamd instead of postscreen?

> 
> Dear All,
> 
> I am building a new server where I would like to build the best spam filter
> possible :)
> I am checking postscreen these days. I am planning to turn on the "deep
> tests" as well, but it seems to be really scary to me :)
> 
> In the doc they say that I can have 2 IPs and set up a secondary MX record
> and usually the sender will immediately connect back from the same IP.
> 
> How good idea is it to do this ? What happens if the sender has a really
> big pool of IPs and they will not use the same IP when reconnect to the 2nd
> MX ? Theoretically it means that that sender will never be able to send
> mail to us right ?
> 
> What is the best practice here ? I am curious for your opinions.
> 
> Thanks,
> Mitya
> 
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