[Gllug] SPAM - trying to block at SMTP level

[Martin A. Brooks]

Tethys wrote:

> But I'm curious about where you get your 3 minute figure from. In my
>
>experience, 15 or 30 minutes is far more common. Plus, of course, the
>delay is entirely determined by the configuration of the remote mail
>server. I've seen sites with a 2 hour delay.
>  
>

They delay only occurs once, the very first time an email from a 
particular sender ip/domain is received. All future emails will be let 
through instantly and the TTL of the record updated.  If this is someone 
you are in frequent contact with then the chances are the record will 
never expire.


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