Mayhem:
> postscreen_dnsbl_max_ttl :
>
> The maximum amount of time that postscreen(8) will use the result from a
> successful DNS-based reputation test before a client IP address is required
> to pass that test again.
Postscreen requires that a remote SMTP client PASS zero or more
TESTs before it is allowed to talk to a Postfix SMTP server.
One TEST is PREGREET
One TEST is DNSBL
The result of a TEST is PASS or FAIL.
After a successful DNSBL TEST (i.e. PASS), postscreen_dnsbl_max_ttl
determines when the client must PASS the TEST again.
Postscreen does not cache FAIL results. That would be a stupid idea:
the vast majority of IP addresses should not send email directly
across the Internet, and spambots are short-lived.
Wietse
