[imp] Which "trash" should we use?

[Maxime Pelletier]

   Hi all,

   In the process of configuring our server, we had to think about how  
to handle deleted messages. Basically, we found 4 ways:

   1. Move deleted messages to a given IMAP folder (usually called "trash")

   2. Mark messages as deleted but leave them in their folder

   3. Move deleted messages to "Virtual trash"

   4. Delete message permenantly

   Obviously, #4 is rarely a good option.

   However, I searched the web and I couldn't find any advice to know  
which one I should use as the default setting, or even which one I  
should force/lock. The most interesting page I found was  
http://deflexion.com/2006/05/imap-way-of-deleting-message .

   I understand what is the difference between #1 and #2, but I don't  
know which one is the best alternative.

   Also, could you explain me the difference between #2 and #3? To  
configure Horde as per #2, I don't check the option saying to move  
deleted messages to a given folder. And for #3, I check the same  
option, but instead of selecting an IMAP folder(which would then be  
#1), I select "Virtual trash" from the drop down list. What I like  
about #3 is that it adds a shortcut to virtual trash in the top  
section of the left sidebar, in the same section of Inbox and Sent.

   One of my biggest concern with that setting is the compatibility  
with other mail clients (phones, tablets, Thunderbird, other webmail,  
...). I prefer to configure my server the same way most of them are  
configured.

   Thanks in advance if anyone can help me out with that

   Maxime