greylist warning message and env_To

Mark G. Thomas
Wed Jul 5 17:59:34 UTC 2006


On Tue, Jan 13, 2004 at 08:58:38AM -0700, Vernon Schryver wrote:
> > From: Tim Wicinski <>
> > ...
> > Also, will greylisting work with Env_To whitelisting and/or sendmail's 
> > delaychecks?  We're trying to open up a few accounts to accept anything, 
> > anytime, regardless.
> Any message that is caught by the DCC client is white- or blacklisted
> for both the DCC and greylisting.
> I'm not sure what is meant by "sendmail's delaychecks."  If you mean
> the adjustments misc/hackmc makes to generated from an .mc
> file with
> #   -O  modify the sendmail rules to treat access_db "OK" and "RELAY"
> #       entries as white-listing the message.
> then the answer should be yes, that turns off greylisting as well
> as DCC mail target counting.  However, I'm not sure I've tested that.
> I have often accidentally tested that TLS authentication turns off
> greylisting.

Is anyone successfully using greylisting with whitelisting effectively
based on env_To ?

I've got several hundred entries in my sendmail-8.13.x accessdb like this:
" FRIEND".  In order to implement greylisting
here, I've got to make sure that messages for certain env_To addresses 
are never greylisted, since I need to ensure these messages are
never delayed or blocked.  I don't care if it's done by sendmail
in accessdb, or if I have to build a separate grey_whitelist, but
I'd like to know if anyone has successfully implemented greylisting
with certain recipient exclusions.



Mark G. Thomas (
voice: 215-591-3695

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