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Greylisting for Qmail

Written by scott

Wednesday, 03 May 2006

Version: 0.3
Greylisting is a spam control method. It works by returning a temporary SMTP error to the first delivery attempt. Most spam is sent from bulk mailers(and worms!) which don't retry, so these are blocked. Real mail servers will retry later after a temporary error, allowing the message through.

The advantage of greylisting is that it's a simple method for reducing spam from malicious MTA's. The disadvantage is that it introduces latency into sending and recieving mail.

You can install it now through yum using:
yum install qgreylist

Comments

Subject: Troubles
Written by jdaustin on 2006-06-20 16:34:22
After the upgrade I had several clients complain. One had an error message of Use of uninitialized value in utime at /var/qmail/bin/greylist line 124.
The others were using Exchange servers.
I tried to remove qgreylist but then mail cannot be delivered at all (port 25 immediately drops connection).

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Last Updated ( Tuesday, 30 May 2006 )

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