Developers of Sympa

[Benoit Ortner <address@concealed>]

Hello,

a new alpha version of SYMPA is available for download!:
http://www.sympa.org/distribution/unstable/

It includes the automatic management of bouncing users: Now bouncing 
subscribers can be automaticaly removed (or notified). Your mailing 
lists will soon have the cleanup they need :-)

This version is currently running on our server and should be reasonably
stable. We look forward to get your feedback ;-)


This new feature is based on a score computed foreach bouncing subscriber:

    * The automatic task eval_bouncer gives a score foreach 
bouncing 			user. The score, between 0 to 100, allows the 
classification of 		bouncing users in two levels. (Level 1 or 2). 
According to the 			level, automatic actions are executed 
periodicaly by 				process_bouncers  task.

    * The score evaluation main parameters are:

      Bounces count: The number of bouncing messages received by 
sympa 			for the user.

      Type rate : Bounces are classified depending on the type of 
errors 	generated on the user side. If the error type is "mailbox is 		 
full" (ie a temporary 4.2.2 error type) the type rate will be 			0.5 
whereas permanent errors (5.x.x) have a type rate equal to 			1.

      Regularity rate : This rate tells if the bounces where 
received 			regularly, compared to list traffic. The list traffic is 
deduced 	from msg_count file data.

      The score formula is  :

      Score = bounce_count * type_rate * regularity_rate


To avoid making decisions (ie defining a score) without enough relevant 
data, the score is not evaluated if :

	o The number of the number of received bounces is lower than 		 
minimum_bouncing_count

        o The bouncing period is shorter than minimum_bouncing_period


Regards.

--------------------------------------
Benoît Ortner
Comité Réseau des universités
-------------------------------------