EHLO vs PTR for validation

Hi Stuart,=0D
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>> We make a decision on smtp dialog after rcpt to:=0D
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>> RCPT TO: [email protected]=0D
>> 550 Your mail was rejected, because your Server has no PTR. To have an=
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>> exception made for you emailaddress contact us using the form on ...=0D
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This was an example only ...=0D
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[Offtopic]=0D
<lots of stuff about helo removed>=0D
UCEPROTECT-Policys have very complex rulesets:=0D
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Standard is on a NON-PTR Situation to check:=0D
1. If Spamtrap hit =0D
2. If Client is responsible as MX for claimed sender domain=0D
3. If Domain has SPF- records set which autorize that IP for that domain=0D
4. If Client is an insecured Windows client :-)=0D
5. If Client tries multiple simultan connections within a short timeframe ..
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and 10 other Tests also .....=0D
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If 1 is true  -> Check if System is on the Neverblacklist ,if yes-> reject=
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- If not -> Blacklist =0D
If 2 is true - > Accept=0D
If 4 ist true - > Reject=0D
if 5 is true - > sub1 Check if Client tries different Helos -> If yes reject
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If sub 1 on Rule 5 is  false and 4 is false and 3 is true -> accept ...=0D
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Hopefully you understand the power of having dependent and independent rules
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[Offtopic off]=0D
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-- =0D
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Johann Steigenberger =0D
Blacklistmaster at UCEPROTECT-Network =0D
http://www.uceprotect.net