[Savannah-cvs] [626] update on spam amounts; document banned domains

[ineiev]

Revision: 626
          
http://svn.savannah.gnu.org/viewvc/?view=rev&root=administration&revision=626
Author:   ineiev
Date:     2023-05-23 00:47:10 -0400 (Tue, 23 May 2023)
Log Message:
-----------
update on spam amounts; document banned domains

Modified Paths:
--------------
    trunk/sviki/FightingSpam.mdwn

Modified: trunk/sviki/FightingSpam.mdwn
===================================================================
--- trunk/sviki/FightingSpam.mdwn       2023-05-21 12:36:18 UTC (rev 625)
+++ trunk/sviki/FightingSpam.mdwn       2023-05-23 04:47:10 UTC (rev 626)
@@ -4,11 +4,11 @@
 
 ## Preventing Spam
 
-Note: as of 2021, Savannah gets little spam in its trackers; the spammers
-seem to concentrate on adding unused accounts that are [[automatically
-deleted a few days later|IdleAccounts]].  The measures listed in this
-section may exclude potential contributions, so you shouldn't take them
-unless the real volume of spam you get is high.
+Note: as of 2023, Savannah gets relatively low amount of spam in its
+trackers; the spammers seem to concentrate on adding unused accounts
+that are [[automatically deleted a few days later|IdleAccounts]].
+The measures listed in this section may exclude potential contributions,
+so you shouldn't take them unless the real volume of spam you get is high.
 
 There are a few options for group admins to prevent spam.
 
@@ -87,3 +87,13 @@
 of posts of new users are likewise forwarded to $sys_mail_admin.
 As of 2023-02-23, $sys_mail_admin points to savannah-reports-private,
 $sys_watch_anon_posts is true, and $sys_new_user_watch_days is 34.
+
+## Banned domains
+
+Ineiev is used to check the log of automatically removed idle accounts.
+When many accounts are created from some email domain, and exactly
+no active accounts in those domains exist, the domain may be banned,
+which means that such accounts are removed twice an hour without further
+delay.  Many in this context means that the numbers are comparable
+to the number of acounts from the gmail.com domain within the same
+period.  As of 2023-05-23, we have two such domains.