[RFCI-Discuss] is a reversename a must ?

[Alan Brown]

On Wed, 23 Jan 2008, Jeff Pang wrote:

> Oops my certain answer is NO. I have been working on huge email
> systems and antispam many years, I know the special cases here. So
> many email servers have no rDNS.

Yes, mostly malconfigured systems run by companies whose admins
are asleep at the switch - or have long since departed.

Such lack of attention usually comes associated with networks that have
non-working abuse/postmaster addresses and little or no attention to
prevention and cleanup of malware infestations (zombie armies, etc)

You are not doing yourself or them any favours by allowing mail through
from networks which have no rDNS or broken DNS.

Encouraging networks and companies to fix broken network setups BEFORE
they become a spammer/script kiddie playground is generally easier than
having to deal with the mess after the event.

> So we now don't and won't in future reject those messages who are
> coming from the servers without rDNS names.

It's your call, but the applicable phrase is "Making a rod for your own
back"

Spam problems are bad enough that requiring networks at least have
someone competent enough to setup DNS before they can send you mail is
not excessive.

AB