Enabling IMAP access

[Roberto Sanchez <rcsanchez97@yahoo.es>]

I have this Woody server (I've written about it several times before). 
Anyhow, I ported the mail configuration over from the previous server 
(RH 9), which the previous admin had setup using IMAP and IMP, for users 
to be able to access their mail via webmail.  For some reason he chose 
to only allow webmail access.  I would like to be able to let my users 
have other means of accessing their mail.

My questions:

- How do I allow this only over SSL (i.e., imaps)?
- Is there a greater security risk in opening this up rather than 
allowing only webmail?
- I am not totally well versed in the various mail protocols, but I want 
to be able to keep the mail on the server, raher than having it deleted 
once downloaded (like POP does).  How do I accomplish that? or is that 
what IMAP is for?

-Roberto

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