How to use GNUPG to sign and encrypt emails?



Hey guys,

I've thought a lot about security lately and one of the "items" on my list is
signing and encrypting my mail using gnupg. Now how is this done? I am currently
using the sylpheed 2.4.5 client compiled with gnupg support. If I choose to sign
and encrypt messages, I am not able to send them.

Do I need to create a key first? And on a side note, what are the benefits of
signing the mail with gnupg.

Thanks,
Amit


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