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neilticktin

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Hi,

We get a ton of spam to some of our more public account -- for example, the one that we take in press releases from. Unfortunately, press releases can look very much like spam, and so we need to keep them fairly loose.

I would like to be able to white list the thousands (but less than 10,000) of domains that we may receive a press release from on the Kerio Mail Server so that they are handled for everyone on the server, not just an individual.

It seems that I could do this through custom rules but clearly the interface suggests that thousands may not be a good idea to do.

Are there better ways? Can Kerio handle this? (It's a 100 user license on a Dual G5 Xserve with plenty of RAM).

Thanks!

Neil
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TorW

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It's probably a little easier with a custom SpamAssassin rule.

Create a file in the same dir as local.cf called "pressreleases.cf" or something similar. Populate the file with lines like these:

whitelist_from press<_a.t_>example.com
whitelist_from pressrelease<_a.t_>example.org
whitelist_from *<_a.t_>example.net

... etcetera. Be warned that real spam with a forged from address found in this list will slip right through since mail from someone on the whitelist will get a -100 score. You CAN use whitelist_from_rcvd and supply the sending mailserver as a second argument, but it will be a pain to maintain.

Restart the mail server daemon when you're done, and take regular backups of the file you created.

[Updated on: Wed, 16 September 2009 10:50]

  •  
neilticktin

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Good stuff, and that's a lot easier to implement.

Has anyone tried this with relatively large lists of white lists? For example, 10,000?

Thanks!

Neil
  •  
TorW

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Come to think of it, whitelisting the recipient will probably be much easier:

whitelist_to press<_a.t_>example.com
whitelist_to another<_a.t_>example.com


Wink

Be aware that this won't work if the recipient is in the Bcc-field in the mail.
  •  
neilticktin

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Yeah -- we actually want to white the sender, I think. Right now, it may be working well enough to not worry about it. We'll know more soon.

Thanks!

Neil
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mickwire

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I had the same goal and did this....

http://forums.kerio.com/index.php?t=msg&goto=64405&S =8f0f8e720e5a1435061e981e6bd6261d&srch=whitelist#msg_644 05

It is working great for me

messages checked: 20973
messages marked by users as spam: 156 (less than %.008)
messages marked by users an not spam: 28

40 users since 9/29

2600 lines in my whitelist (mx records)
12416 lines in my blacklist (mx records)
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