[CS-FSLUG] How to keep from getting spammed?
Frank Bax
fbax at sympatico.ca
Wed Sep 22 08:35:00 CDT 2004
At 11:59 PM 9/21/04, Don Parris wrote:
>PowWeb, my webhost, uses greylisting, mentioned in another
>e-mail on this list. I still a get a bit of spam, but very little.
A point of clarification - greylisting must be installed on mail server
receiving email for domain, it's not a client side solution.
I've been using it on my OpenBSD server for a few weeks now. With
greylisting, there is no such thing as a holding area - either the message
gets to your mailbox, or it's rejected. It works very well, I've not heard
about any false positives from users. I've only found two "problems" so far:
1) ISP's that use SMTP server pools. Greylisting doesn't like ISP's that
use a different server when asked to resend a message. These "pools" end
up being "whitelisted".
http://greylisting.org/whitelisting.shtml
2) The server providing secondary mail server support for my server does
not use greylisting. A spammer that connects to the secondary MX will
bypass the greylisting system.
Frank
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