Differences

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--- services:e-mail_service:antispam_filters [2016/10/28 12:27]
zanello [Barracuda Spam Firewall]
+++ services:e-mail_service:antispam_filters [2021/12/09 12:44]
giunta removed
@@ Line 4: / Line 4: @@
 In the last years the SPAM phenomenon (Unsolicited Bulk & Commercial E-mails) has grown exponentially. Today the SPAM is over the 50% of the total e-mail traffic. In order not to waste time discarding UCE and IBE e-mails, complex filters are required for the incoming e-mail traffic. **SISSA has two filters for the incoming e-mails**.
-\\
 ==== SafeMail =====
-**The first filter for the incoming e-mail is SafeMail, a commercial product of Spin** (http://www.spin.it). This software is installed on the incoming e-mail gateway server. This machine is named hermes.sissa.it that is also the Mail Exchanger (MX) for the domain sissa.it. This filter **is applied by default to all the incoming mail** for the domains sissa.it and democritos.it.
+**The first filter for the incoming e-mail is SafeMail, a commercial product of Spin** (http://www.spin.it). This software is installed on the incoming e-mail gateway server. This machine is the Mail Exchanger (MX) for the domain sissa.it. This filter **is applied by default to all the incoming mail** for the domains sissa.it.
 This software use some RBLs (Real-time Spam Black Lists) to reject SPAM.
@@ Line 17: / Line 16: @@
 More information about Spin SafeMail are available at address http://www.spin.it/spam/#eng.
-Real-time statistics about SafeMail filter are available on the web page  (available only inside SISSA network):  http://hermes.sissa.it/cgi-bin/spamstats
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-==== Barracuda Spam Firewall ====
-**The second filter is Barracuda Spam Firewall**, a commercial appliance (special hardware with customized software), produced by [[http://www.barracudanetworks.com/|BarracudaNetworks]]. This machine operate with several anti-spam filters (DNSBL filters, euristhics filters, bayesian database, etc.).
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-** At every incoming mail is assigned a spam score value**. Higher values are feature of SPAM e-mails.
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-**Only the e-mails** tagged definitively as Spam (**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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-The score may be negative o zero when the message is classified as not-spam. Values higher than 3.5 means that the mail is probably a SPAM message. The score should be used by an automatic procedure to separate the legitimate e-mails from the SPAM. \\
-For more information and to manage your Spam level, please read [[services:e-mail_service:webmailfaq:start|WEBMAIL interfaces FAQ]].
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-Real-time statistics about Barracuda filtering are available on the web page: http://spam-stats.sissa.it/ (only internal). \\
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 ===== Anti-Virus Filters =====
@@ Line 85: / Line 63: @@
 \\
-===== Blocked E-mail Notification =====
-SISSA mail server will alert users when they receive an e-mail containing a banned content. Our server do NOT reply to external e-mail sender.
-\\
-==== Blocked Notifications for Received E-mail ====
-When our mail server finds banned content in an e-mail destined to your e-mail address, it will send you an e-mail.
-This is example, where:
-  * //your_username@sissa.it// is your e-mail address.
-  * //sender@example.com// is the e-mail address of the sender (may be empty in case of spam).
-  * //filename// is the name (or only the extension ) of the banned file.
-<code>
-From: SISSA SISSA Barracuda Spam Firewall <postmaster@sissa.it>
-To: your_username@sissa.it
-Subject: BANNED FILE IN MAIL TO YOU (from <sender@example.com>) /
-         FILE BLOCCATO IN UNA MAIL DIRETTA A TE ( spedita da <sender@example.com>)
-BANNED FILENAME ALERT
-The SISSA Spam Firewall (charon.sissa.it) found an attached
-file 'filename' in an e-mail sent from <sender@example.com>.
-Due to security reason, our system has been set to block this type of file.
-For further information, visit:
-http://www.itcs.sissa.it/services/e-mail_service/antispam_filters#anti-virus_filters
--------------------------
-AVVISO FILE BLOCCATO
-L'anti-spam della SISSA (charon.sissa.it) ha trovato un file 'filename'
-allegato ad una mail inviata da <sender@example.com>.
-Per motivi di sicurezza, il nostro sistema ha bloccato questo tipo di file.
-Per ulteriori informazioni, visita:
-http://www.itcs.sissa.it/services/e-mail_service/antispam_filters#anti-virus_filters
-</code>