On Mon, 15 Jan 2007, Vinny Wadding wrote:

> If you use the AUTH command on an normal connection to the server, your 
> user name and password would be sent in plain text.   A malicious person 
> with a packet sniffer would be able to capture the authentication 
> details en route.
> 
> I was hoping there would be a way to improve the security of people 
> logging into the server.  That if they connected with an unencrypted 
> session, they would be restricted to more secure logins protocols 
> (possible limit it to cram-md5?) or disconnected with an error "534 
> Authentication mechanism is too weak" or "538 Encryption required for 
> requested authentication mechanism" (as mentioned in RFC2554, I think).  
> If they connected via an encrypted session they could be presented with 
> a the full set of protocols supported?

It makes some sense, although an MUA that sees CRAM-MD5 advertised, it 
should use that instead of the clear text ones.



- Davide


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