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Try 'man mailto'. The 'man' command allows you to see things about a command like flags, support files, what it's meant to do, it's version number and how to run it.
Mutt worked for me, well it connected and the crashed when opening the INBOX. It would probably work if I spent some time on it.
It should work for you too although using a version of links with ssl support would probably be easier if you must stick to text based email.