Milter-greylist

On Sun, Jul 11, 2004 at 11:21:14PM +0200, Matthias Scheler wrote:
> 
> Using a setup like this will make sure that your mail only accepts e-mail
> for valid address. The sendmail on my system bounces invalid addresses
> without greylisting them:
> 
> Jul 11 03:49:03 colwyn sm-mta[25815]: i6B1n0Yf025815: ruleset=check_rcpt, arg1=<fuji@...>, relay=[65.182.128.171], reject=550 5.1.1 <fuji@...>... User unknown
> Jul 11 03:49:03 colwyn sm-mta[25815]: i6B1n0Yf025815: from=<Santiago@...>, size=0, class=0, nrcpts=0, proto=SMTP, daemon=MTA, relay=[65.182.128.171]
> 
> This is of course only necessary when your system accepts e-mail for
> non-local users. Invalid local addresses will always be bounced before
> greylisting is applied.

We use a perl script to populate an access file from Exchange's LDAP
info and reject as above. Of course, if Exchange didn't blindly accept
and then reject later, we wouldn't have to jump though these hoops.

Graham