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hints:spam_virus_filtering_classic_linux [2021/01/16 17:49]
admin [Navigation]
hints:spam_virus_filtering_classic_linux [2021/03/06 12:19] (current)
admin [Where spam and viruses go]
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-====== Classic Linux hints: spam and virus filtering in Classic Linux ======+====== Spam and virus filtering in Classic Linux ====== 
 + 
 +[ [[:Classic Linux]]. ] 
 + 
 +(Analogous information will be made available in the near future for the [[:DirectAdmin]] environment.)
  
 Spam and virus filtering in the [[:classic_linux|Classic Linux]] environment is done in two different places. Spam and virus filtering in the [[:classic_linux|Classic Linux]] environment is done in two different places.
  
-First, when incoming mail arrives via SMTP, any mail that either contains an identifiable virus +First, when incoming mail arrives via SMTP, any mail that either contains a clearly identifiable virus (as diagnosed by **clamd**), or is spam with a high degree of certainty (as diagnosed by **rspamd**), is immediately rejected and never accepted. The sender will get a bounce explaining why the email was rejected. This is not under user control
-(as diagnosed by **clamd**), or is spam with a high degree of certainty (as diagnosed by **rspamd**), + 
-is immediately rejected and never accepted. This is not under user control.+Second, any mail that is accepted, which might or might not be spam, is spam-filtered via **SpamAssassin**. This is under control of the user, and can be switched on or off via the [[:Virtualmin]] control panel. 
 + 
 +====== Where spam and viruses go ====== 
 + 
 +If you go to the menu: 
 + 
 +<tab>Virtualmin => Server Configuration => Spam and Virus delivery 
 + 
 +you can see which folders are configured by default to receive spam and viruses. (You can also change these if you want to, but please exercise great caution, and make a screenshot before you make changes. Then you can restore any changes if needed.) 
 + 
 +These spam and virus folders will be automatically created as soon as your first spam or virus is received. 
 + 
 +Note, however, that in our current system (see [[hints/classic_linux_mail_flow|Classic Linux mail flow]]) if an incoming email contains a known virus, it is immediately rejected and never reaches your account nor any virus folder. So in practice no virus-infected email should ever reach you or your virus folder. 
 +===== View spam and virus folders in Roundcube webmail ===== 
 + 
 +Roundcube webmail might not automatically show you the spam and virus folders. To make them visible, please do the following. 
 + 
 +There is a little icon near the top of the screen, a little to the right of your email address, that looks like three dots, vertically stacked. (It looks like this **⋮** on devices with the right fonts.) Clicking on this will give you a pop-up menu from which you can click on Manage folders. Now you can enable or disable the folders you want to see, including the spam and virus folders. 
 + 
 +To actually access mail in these folders, click on the Mail icon at the left, then on a folder.
  
-Second, any mail that is accepted, which might or might not be spam, is spam-filtered via +===== Teaching the system to recognize spam or no-spam =====
-**SpamAssassin**. This is under control of the user, and can be switched on or off via the +
-[[:Virtualmin]] control panel.+
  
 +  * [[hints:teaching_system_recognize_spam_not|Teaching the system to recognize spam or not-spam]]
 ====== Navigation ====== ====== Navigation ======
  
-Some of the more useful pages are listed below. Please see the sidebar menu for more.+Below is a small selection of useful pages. Please see the sidebar menu for many more.
  
 Some pages reside in a separate [[hints:sidebar|Hints]] menu. It you find yourself Some pages reside in a separate [[hints:sidebar|Hints]] menu. It you find yourself
 there, just follow the [[:start|Top]] link to get back to the main menu. there, just follow the [[:start|Top]] link to get back to the main menu.
  
-  * Current Pages, up-to-date in December 2020 +  * [[:billing_system|Billing System (revised for 2020)]] 
-    * [[:billing_system|Billing System (revised for 2020)]] +  * [[:classic_linux|Classic Linux (revised for 2020)]] 
-    * [[:classic_linux|Classic Linux (revised for 2020)]] +    * [[hints:spam_virus_filtering_classic_linux|Spam filtering in Classic Linux]] 
-      * [[:ssh_restrictions|Classic Linux SSH Restrictions]] +    * [[:File layout in Classic Linux]] 
-      * [[:procmail_classic_linux|Procmail mail filtering in Classic Linux]] +    * [[hints:classic_linux_password_changes]] 
-      * [[:classic_linux_hints:spam_virus_filtering_classic_linux|Spam filtering in Classic Linux]] +  * [[:DirectAdmin|DirectAdmin (revised for 2020)]] 
-      * [[:cli_mua_classic_linux|Command-line mail user agents in Classic Linux]] +  * [[:alpine_mua|Command-line mail user agent Alpine]] 
-      * [[:classic_linux_migration|Classic Linux migration procedure]] +  * [[:Plus addressing]] 
-      * [[:File layout in Classic Linux]] +  * [[:ssl_certificates|SSL certificates]] 
-      * [[:classic_linux_account_conversions|Classic Linux account conversions and updated billing]] +  * [[:Classic Linux vs DirectAdmin]]
-      * [[:Classic Linux password changes]] +
-    * [[:DirectAdmin|DirectAdmin (revised for 2020)]] +
-      * [[:procmail_directadmin|Procmail mail filtering in DirectAdmin]] +
-    * [[:alpine_mua|Command-line mail user agent Alpine]] +
-    * [[:mutt_mua|Command-line mail user agent Mutt]] +
-    * [[:Plus addressing]] +
-    * [[:ipv4_and_ipv6|ipv4 and ipv6]] +
-    * [[:ssl_certificates|SSL certificates]] +
-    * [[:Classic Linux vs DirectAdmin]]+
  
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hints/spam_virus_filtering_classic_linux.1610848140.txt.gz · Last modified: 2021/01/16 17:49 by admin