Re: preventing IP blacklisting emerging from sender address verification

2010-04-11 Thread Wietse Venema
John Levine: > >Should I disable SAV for some domains to prevent blacklisting? Which domains? > > Yes. All of them. > > SAV is widely considered to be abusive, since it is technically > indistinguishable from spammer address verification. It's also rather > ineffective since great amounts of sp

Re: preventing IP blacklisting emerging from sender address verification

2010-04-10 Thread John Levine
>Should I disable SAV for some domains to prevent blacklisting? Which domains? Yes. All of them. SAV is widely considered to be abusive, since it is technically indistinguishable from spammer address verification. It's also rather ineffective since great amounts of spam now uses random sender a

preventing IP blacklisting emerging from sender address verification

2010-04-10 Thread Oguz Yilmaz
I am testing sender address verification on our servers. When I first enable reject_unverified_sender before RBL testing, in 1 day, my IP addresses was in CBL blacklist after 1 year of clerance. Then I have tuned the configuration and put sender address verification after most of the UCE measures.