Selective Sender Address Verification


Selective Sender Address Verification
\ Elijah Savage (5 May 2008)
. \ Tandon, Sahil \(IM\) (5 May 2008)
. . \ Elijah Savage (5 May 2008)
. \ Jan P. Kessler (5 May 2008)
. \ mouss (5 May 2008)
. . \ Elijah Savage (5 May 2008)
. . . \ mouss (5 May 2008)

1 msg	reject_unverified_recipient and it's parameters
2 msg	Mail routing
14 msg	unknown client error
6 msg	Dovecot SASL doesn't seem to be working with Po...
12 msg	ignore pipe(8) return code (don't bounce) ?
1 msg	Tony Earnshaw, 29/02/40 - 29/04/08
2 msg	Client can't connect to SMTP
2 msg	Can't receive mail for virtual user
4 msg	the lingering ghost of amavis
5 msg	email firewall/gateway but with root mail
4 msg	Reply on receive of MS Office 2007 files...
1 msg	OT: Email Reputation Management
8 msg	open relay problem detected by DSBL, how to dis...
1 msg	ldap users & aliases config
7 msg	MY virtual_mailbox_aliases aren't working ...
5 msg	smtp auth/local delivery question
3 msg	helo error help
40 msg	Other good RBLs, apart from Zen?
6 msg	Idle hands... cleanup needs to be linked agains...

Subject:	Selective Sender Address Verification
Group:	Postfix-users
From:	Elijah Savage
Date:	5 May 2008

I know this could add delay on a very busy system. But as of late I have
been battling backscatter to legitimate users on my system. 99% of it seems
to be originating from these domains,
Ru
Uk
Br
It

Has anyone used this as a method to fight backscatter?

I have read http://www.postfix.org/BACKSCATTER_README.html and have it
deployed just as an FYI.

It seems since Friday of last week I have seen a big increase of this.
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