Peter Bowyer wrote:
> On 09/11/06, Marc Perkel <[EMAIL PROTECTED]> wrote:
>   
>> Larry Rosenman wrote:
>>     
>>> Marc Perkel,
>>>     Your junkemailfilter.com server that does the sender verify has what
>>> looks to be dynamic/generic rDNS.  This causes
>>> MY server to reject your sender verify:
>>> Nov  8 08:12:24 thebighonker exim[32310]: H=5.ctyme.com (pascal.ctyme.com)
>>> [69.50.231.5]:35579 I=[192.147.25.65]:25
>>> F=<[EMAIL PROTECTED]> rejected RCPT <[email protected]>: EL:
>>> () in EL list
>>>
>>> Can you get the rDNS to be more legitimate?
>>>
>>> Thanks,
>>> Larry Rosenman
>>> (Sorry for taking THIS lists bandwidth, but I know Marc is on it, and I
>>> can't email him
>>> Directly because of this).
>>>
>>>       
>> Well, the reverse lookup is 5.ctyme.com - I suppose I could change that
>> but why do you think it's dynamic?
>>     
>
> Because he has a heuristic for determining dynamic hosts from their
> hostname - like DynaStop does. This is an inherent weakness of such
> schemes, and why you should be cautious in relying on them.
>
> (I've no idea whether this particular pattern would trigger DynaStop,
> but the point is a general one)
>
> Peter
>
>   

Is it triggering DynaStop?

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