domain blocking for DNS

[Jason Crowe]

I would say no. Just because most people have no control over their 
reverse dns as it is in the hands of their ISP.

Hanasaki JiJi wrote:
> Adding a parallel thread to "domain blocking due to spam".
> 
> Some of you might have noticed a msg sent to me via the list becuase the 
> sender was being bounced when sent directly.  I recently added a 
> configuration to my mailserver to reject connections from sources that 
> do not have forward/reverse DNS setup.
> 
> This resulted in alot of rejections from ligitimate companies and 
> induviduals!  It was put into place becuase some spam seems to come from 
> telnet sessions on an IP that has no DNS / ReverseDNS entry.
> 
> Do you folks think it is reasonable to expect admins to have both DNS 
> and ReverseDNS propperly configured?  at least for their outgoing 
> mailserver?
> 
> Thanks
> 
> 
> 
>