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GreyListed I/Ps

Printed From: LogSat Software
Category: Spam Filter ISP
Forum Name: Spam Filter ISP Support
Forum Description: General support for Spam Filter ISP
URL: https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=6866
Printed Date: 28 December 2024 at 5:50pm


Topic: GreyListed I/Ps
Posted By: ebtsup
Subject: GreyListed I/Ps
Date Posted: 17 August 2010 at 2:15pm
We stopped SF service... along with several other services.. to adjust for some other testing.   It appears, at least in this one case, that when we stopped the service, that the list of I/P addresses that have been GreyList approved (meaning that they had their 5 minutes of withholding complete) - starts from scratch again upon start up.

In other words, if Gmail has orignally passed its I/P greylist test.. after the re-boot, it (the gmail - as an example) - had to go through the greylist test again.  Is this normal behavior?


Replies:
Posted By: yapadu
Date Posted: 17 August 2010 at 9:35pm
IP addresses that pass the greylist test are written to disk and reloaded when spamfilter is next started so that information is not lost.

The list is a text file stored under the domains directory, the file is called greylistallowed.txt so you can see how many addresses are in there.


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I am a user of SF, not an employee. Use any advice offered at your own risk.

Posted By: LogSat
Date Posted: 17 August 2010 at 10:23pm
As Yapadu correctly stated, SpamFilter will flush to file the list of IPs that have been permanently allowed via the GreyList approved filter. The flush will occur, in addition to when SpamFilter is shut down, every 5 minutes in case of server failures.

Please note however that if an IP makes an initial contact, and is thus in a "limbo" state waiting for the 5 minutes (or whatever value has been configured) after which it can retry and be allowed to reconnect, this "limbo state" is kept in memory only, and is not flushed to disk. So if SpamFilter is restarted before the IP makes a second connection, this initial process to pass the greylist filter will restart, requiring that IP to, once more, make an initial connection, wait 5 minutes, then reconnect.


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Roberto Franceschetti

http://www.logsat.com" rel="nofollow - LogSat Software

http://www.logsat.com/sfi-spam-filter.asp" rel="nofollow - Spam Filter ISP

Posted By: ebtsup
Date Posted: 18 August 2010 at 6:31am
hmmm, ok. We'll check (play) with that again.  
Just FYI.. we are doing some of these tests.. to see what we need to forward to the 'hot' offsite backup servers.  Right now we sync every 5 minutes.... so maybe the combination of the two.  ...  Thank you for the information (and your patience with all my newbie questions).


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