[Pine-info] INBOX-Path parameters

[Joseph Tam]

Matt Ackeret <mattack at apple.com> writes


> On Sat, 27 Jan 2007, Chris Wilson wrote:

> > I don't know if any way to disable that [INSECURE] prompt, other than to use

> > TLS or SSL, sorry.

> 

> How do I tell if my server supports TLS or SSL?  (I presume it doesn't support

> TLS, since I have /notls turned on.. but it could've been something it didn't

> support in the past.)


You can telnet or netcat to the IMAP port and read the capability banner string

 	> telnet imapserver 143
 	* OK [CAPABILITY IMAP4REV1 LITERAL+ SASL-IR LOGIN-REFERRALS STARTTLS LOGINDISABLED] imapsrv IMAP4rev1 2004.357 at Mon, 29 Jan 2007 15:49:21 -0800 (PST)

If it doesn't give a capability banner, you can try to initiate a TLS session and see
if it barfs:

 	xx STARTTLS

It should reply

 	xx OK STARTTLS completed

If you can connect to port 993, that's also a pretty good sign it supports IMAP/SSL. 
If you have openssl, you can talk over an encrypted channel directly

 	openssl s_client -connect imapserver:993

Joseph Tam <tam at math.ubc.ca>