On the imap server, do this:
# cd /etc/ssl/certs/
# openssl req -new -x509 -nodes -out imapd.pem -keyout imapd.pem -days 365
Generating a 1024 bit RSA private key
writing new private key to 'imapd.pem'
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
Country Name (2 letter code) [AU]:US
State or Province Name (full name) [Some-State]:New Hampshire
Locality Name (eg, city) :Merrimack
Organization Name (eg, company) [Internet Widgits Pty Ltd]:Wildcat Learning
Organizational Unit Name (eg, section) :Home Server
Common Name (eg, YOUR name) :Marc Nozell
Email Address :firstname.lastname@example.org