Mozilla Browser

Log SSL-Connections:

To log SSL-connections for imap-sessions enter

# export NSPR_LOG_FILE=/tmp/mozlog.txt
# export NSPR_LOG_MODULES=IMAP:5

and start mozilla.

Update: This does also work with thunderbird and firefox. See also Mozilla Wiki

Change user agent string:

In prefs.js:

user_pref("general.useragent.override", "my own useragent string");