Remote User's SMTP relay authorization

[John Gibson]

Hi, all.

I am trying to install Cyrus and Postfix to do three things.

1. Local IMAP
2. Remote/Roaming POP
3. Regular Mail transport.

I am using the Berkeley DB support within Cyrus to have simple 
plain-text authentication after TLS is started to encrypt the sending 
channel.  This is simple and is great for my small user community.

I have a sales team which needs to be able to use a SMTP relay while "on 
the road".  There is a " TLS 
<http://www.aet.TU-Cottbus.DE/personen/jaenicke/postfix_tls/> patch by 
Lutz Jaenicke." to Postfix which seems like it might be a good solution. 
 The nice thing there is that by using CA user authentication, the 
*user* is identified before SMTP relays are allowed.  However, the 
number of  mail clients that can actually do this seem very limited 
(netscape, mozilla ?).

I would appreciate any recommendations or success stories which utilize 
Cyrus IMAP as the standalone mail server and also ways to allow SMTP 
relaying to *only* our valid, authenticated users.


...john

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