On Thu, Dec 27, 2007 at 04:51:31AM -0800, John H. Robinson, IV wrote:
In fact my own server will not accept mail from "UNKNOWN" hosts ( it
resolves the hostname, then resolves the IP PTR, and compares the
hostname and the resulting PTR record )
Please fix your mail host. It is breaking the internet.
The hostmaster for sparkplug.kernel-panic.org needs to ask the IP
address provider to add the PTR record ( it should point back to
"sparkplug.kernel-panic.org" ).
I disagree. The RFC disagrees.
The RFC only says that it cannot reject the message. It can still use this
information to help determine if the message is spam. It is similar to SPF
records. The host cannot reject the message at the SMTP level (and comply
with the RFC) but is certainly free to reject it.
Spam has caused lots of awful breakage of protocols. It's very annoying.
Dave
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