>What would you suggest as a RBL replacement ?

as I said, hike up your credentials

>Is there a mini how to on setting up SAV ?

at then end of your restrctions:

warn_if_reject reject_uneverified_sender,

elsehwere in main.cf:

address_verify_map = hash:/var/log/address_verify.map
address_verify_positive_expire_time = 31d
address_verify_positive_refresh_time = 7d
address_verify_negative_cache = yes
address_verify_negative_expire_time = 12h
address_verify_negative_refresh_time = 3h
unverified_sender_reject_code = 554

see the VERIFY_README

run it for week, whitelist the legit, then then remove the warn_if_reject.

> >>The other tactic is to insist on impeccable SMTP/DNS credentials from
>every
>
>Are most IMGaters blocking SMTP servers without .PTR records ?

I bet not.  I have restriction_class that says:

"if PTR unknown, then reject_unknown_hostname"

ie, you have to screw up both to get rejected.

Len




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