Martin A. Brooks wrote:
>
> So, if i understand your argument correctly, if the PTR were
> "z0mgpuppieslolzw000000000000pony.antibodymx.net", that would make my
> email somehow more likely to be legitimate? How do you know that
> "z0mgpuppieslolzw000000000000pony" isn't somehow derived from the IP
> address? Short anwer: you don't. Blocking mail from known DSL and/or
> dynamically assigned IP ranges is one thing, blocking mail based on the
> rDNS hostname format is, errrm, brave.
>
>
Spamassassin with stock settings and using DNS does issue a very high
score on PTR that seem generic. So your mail may end up rejected by
spamassassin if your PTR looks like too generic.
For example:
194.78.221.35 (35.221-78-194.adsl-fix.skynet.be) incorrectly presented
itself as DC.aztek-int.local
X-Spam-Score: 10.3 (++++++++++)
X-Spam-Report: pts rule name description
---- ----------------------
--------------------------------------------------
4.4 HELO_DYNAMIC_IPADDR2 Relay HELO'd using suspicious hostname (IP
addr
2)
4.2 HELO_DYNAMIC_SPLIT_IP Relay HELO'd using suspicious hostname (Split
IP)
1.6 TVD_RCVD_IP TVD_RCVD_IP
0.0 HTML_MESSAGE BODY: HTML included in message
0.1 RDNS_NONE Delivered to trusted network by a host with
no rDNS
smime.p7s
Description: S/MIME Cryptographic Signature
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