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services:e-mail_service:antispam_feedback [2011/03/28 17:30] marina |
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- | ====== Anti-Spam Feedback ====== | ||
- | To improve the spam filters we need a feedback by the users.\\ | ||
- | * **False positives** are legitimate e-mail messages that are mistakenly blocked or tagged as spam by the anti-spam filter . | ||
- | * On the other hand there are e-mails (**//false negatives//**) that pass the anti-spam filters and arrives on the users' inbox, but they are spam. | ||
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- | ---- | ||
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- | Our internal anti-spam [[antispam_filters#barracuda_spam_firewall|Barracuda Spam Firewall]] assigns to every incoming mail **a spam score value**. | ||
- | E-mails with values higher than 3.5 are probably SPAM messages and the anti-spam tags their "//subject line//" with the identifier //**[Maybe SPAM]**// | ||
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- | **Only e-mails with very-very-high spam score (over 9 points) are blocked by the Barracuda Spam Firewall**. \\ | ||
- | The others --//allowed or tagged as probably spam//-- are delivered to the final user. | ||
- | \\ | ||
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- | * See here about [[webmail-horde:filter:spam-level| how to manage my e-mail spam filters using HORDE ]]. | ||
- | * See here about [[webmail-squirrel:filter:spam-level| how to manage my e-mail spam filters using SQUIRRELMAIL ]]. | ||
- | * See here for [[services:e-mail_service:Some-definitions|some useful answers]] to questions about spam. | ||
- | \\ | ||
- | ---- | ||
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- | ===== Anti-Spam Notifications ===== | ||
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- | When you find a:\\ | ||
- | * **false positive** --mail tagged as SPAM or "[Maybe-SPAM]"-- which is NOT a real spam | ||
- | or\\ | ||
- | * **a spam** mail without "[Maybe-SPAM]" in the subject, | ||
- | please forward it, with its complete header, to [[spam@sissa.it]] specifying in the //subject// if it is:\\ | ||
- | a **FALSE POSITIVE** or a **SPAM**. | ||
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- | The operators take the notifications and update the filters. | ||
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- | The COMPLETE headers are needed because they contain the information about the real sender and the e-mail delivery. | ||
- | We will take the notifications and update the filters, in order to make the filtering better. | ||
- | \\ | ||
- | You find here a [[services:e-mail_service:header-example|typical header example]]. | ||
- | \\ | ||
- | You find below some instructions to correctly send us the complete header. | ||
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- | === Using PINE to send us the complete e-mail header ==== | ||
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- | You must enter/exit the //header mode// with the key **H**. | ||
- | When you enter the header mode The program shows at the bottom of the screen the [Display of full headers is now off.] or [Display of full headers is now on.] | ||
- | Now you can forward us your e-mail. | ||
- | \\ | ||
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- | === Using Thunderbird to send us the complete e-mail header ==== | ||
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- | Open the message and then select the menu **//View//** --> **//Headers//** --> **//All//**: you will see on the message window the complete headers of the messages. | ||
- | Now you can forward us your e-mail. | ||
- | \\ |