IP address reputation, BorderWare

[Dhawal Doshy]

Gerard Seibert wrote:
> On Thursday March 22, 2007 at 06:02:19 (PM) Denis Croombs wrote:
> 
>>> That's interesting. Can you explain your position?
>>>
>> Over 90% of the email that the 200+ domains I protect is spam from spoofed
>> email address's, why should I send an email to these poor sods who have had
>> they email address spoofed just to fill up their email inbox.
>> As far as I am concerned it is a joke system that compounds the spam issue.
> 
> There was a discussion on the postfix forum a few days ago that concurred
> with your thesis. I personally never employ it myself. A waste of time
> and bandwidth in my humble opinion.

To add further if you are a really low traffic (< a few thousand mails a 
day) sender verification is a probable option else don't even think 
about it..

Also there are some sites that might blacklist you for repeated sender 
verification. Finally sender verification fails with sites like yahoo 
who will accept any address in the 'helo/mailfrom/rcptto' part but will 
reject during 'data'