-----Original Message-----
From: Dennis Willson [mailto:taz(_at_)taz-mania(_dot_)com]
Sent: Monday, August 22, 2005 2:04 PM
To: spf-discuss(_at_)v2(_dot_)listbox(_dot_)com
Subject: Re: [spf-discuss] OT: SMTP pre-filter server
There is a configuration option that allows you to use SPF during the SMTP
conversation. I use that setting and it then tests SPF before the
greylisting.
Thanks. I guess their web site could be clearer then.
If that works for you, that's great, but generally speaking, SPF is a pretty
heavyweight test. I'm not sure where in the scheme of things you are doing
this, but it's not generally adviseable to do SPF checks until after RCPT
TO: and you've validated RCPT TO:. Doing SPF up front may work for you, but
in many cases it's had a negative effect on performance.
Scott K