Milter-greylist

> We had some problems with spf, as
> 
> 1. there are more spammes that have spf records then regular users
Well, I noticed some domains have "+all" or similar, but that is why
you have the "self" operator here , right?
> 2. forwarding breakes spf for some forwarder, and i have found no
easy way
I know SPF breaks forwarding, but I assumed mostly people forward in
"procmail" phase which does SRS... I thought there is minimum
forwarders without SRS out there.

I was hoping to avoid spamassasin as it can not act in early SMTP stage.

> The following site has many good methods to reduce spam.
> http://www.acme.com/mail_filtering/introduction_frameset.html
> 
I know the site, very good, but a bit obsolete (does not cover DKIM).
In general is DKIM maybe better than SPF, as:
- it can not be so easily abused by spammers
- does not break forwarding

Anyway, in long term I would like to base the company antispam
solution on something else than greylisting as it is not very "nice"
approach. Unfortunately, there is nothing else so effective at the
moment....

>