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der_lutz

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hi

we are working with kerio mail server 6.7.0 and apple mail in a macintosh network.

lately many mails of our own domain are moved to the junk mail folders, even my admin<_a.t_>domain.com.
as the mailserver decides whether a mail is junk or not i cannot understand why its own domain is (sometimes) marked as spam.

overall i am absolutely dissapointed about the junk-mail recognization system. i think i will disable the learning mode and apple mail will handle the junk mail locally by marking it.

otherwise we'll get a total mess here.

any ideas??
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freakinvibe

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If your own domain is in the sender address, the mail is not automtically white-listed because any spammer could put your domain in the sender address.

But there are possibilities to avoid false positives that come from your own users: Put together a list of "good" IP addresses and configure KMS not to Spam check mail from that IP addresses.

Can you send us the headers of one of your mails that gets inadvertantly marked as spam? That helps finding out, why it is marked as spam.

[Updated on: Mon, 10 August 2009 16:58]


Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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der_lutz

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hi

in the admin console it says that all IPs of private networks are in the whitelist by default.


either way, i set a rule to ignore spam filter for my own domain from now on. maybe this works.

i will keep an eye on the headers but until know i couldn't find obvious spam character.

thx anyway...
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freakinvibe

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In the e-mail header you should see something like this, this helps you finding out, why your mails get marked as spam:
Quote:

X-Spam-Status: Yes, hits=9.7 required=5.0
tests=BAYES_99: 4.07,DCC_CHECK: 2.17,FS_START_LOSE: 2.167,
HTML_MESSAGE: 0.001,RDNS_NONE: 0,TVD_RCVD_SINGLE: 1.351,
TOTAL_SCORE: 9.759,autolearn=no
X-Spam-Flag: YES
X-Spam-Level: *********


Also, white-listing your domain will result in any spam that has your domain spoofed in the sender address coming through. So I would not recommend it.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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der_lutz

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the thing is, e.g. today a college sent a mail to all members of our domain, spreading his new telephone number.

some members recieved it right in their incoming, in some cases it was marked as spam (about 70%:30%)

the headers are about this:
X-Spam-Status: No, hits=0.0 required=4.0 tests=AWL: 0.322,BAYES_00: -1.665,EXTRA_MPART_TYPE: 1, HTML_MESSAGE: 0.001,RDNS_NONE: 0,TOTAL_SCORE: -0.342,autolearn=no
X-Spam-Level:

X-Spam-Status: No, hits=0.0 required=4.0 tests=BAYES_00: -1.665,HTML_MESSAGE: 0.001,RDNS_NONE: 0, TOTAL_SCORE: -1.664,autolearn=ham
X-Spam-Level:

i thought a negative spam score, or a value under the threshold means it isn't spam...

i just don't get it...
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freakinvibe

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KMS has not marked your messages as Spam. By default any score below 5.0 is not considered spam. Is it possible that a firewall or gateway between KMS and the Internet is marking your mails as spam?

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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der_lutz

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hm.

what else could do that?

is it possible that apple mail decides on its own way? our reseller told me to activate the apple mail junk rules (to forward mails which meet the requirements to any kerio junk-mail folder, so kms learns of apple mails behaviour).

would you recommand to turn off the apple mail spam filter?

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freakinvibe

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I am not familiar with Apple, but in general, if you have multiple systems that mark spam, it might be very cumbersome to find out which system tagged your mail as spam for what reason.

So try to switch off the Apple Spam checker for the moment and try to optimize the KMS Spam enginge (which is quite good). Use Spam repellent, Black lists, Bayes and SPF.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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p0ddie

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You actually have the explanation to your problem:

If Kerio would mark this mail a colleage sent to all your staff as spam, why would it mark some of the mails as spam and some not? It is the same mail, right?

Please deactivate Junk Mail filtering in Apple Mail.

One hint as to how this might have happened (Apple Mail detecting legit mails as junk): People use the junk mail folder instead of the deleted items folder to trash mail.

I've seen this happen a lot. Problem is these mails are being flagged as junk and the mailserver learns to automatically junk these mails based on their criteria.
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der_lutz

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hi

thanks for the hint.

i'll try deactivating apple mail's spam filter. although it says in the handbook to activate it with a certain rule (not marking junk but moving it to a junk mail folder, so the server learns.

but i don't think that people accidently move trash mails to the junk mail folder.

case closed. Razz
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Pavel Dobry (Kerio)

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It is Apple Mail who incorrectly marks the messages as spams. Based on my experience, I recommend to disable Junk Email filtering in every client and user KMS anti-spam capabilities for spam filtering.
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