What is the benefit of signing an encrypted email

[Robert J. Hansen]

> More often "I have no confidence they keep their secret keys strictly under 
> their control" might be the relevant objection.

In my case, it's "I think these individuals are mentally unstable and violent," but yes.  :)

>> Speaking for Enigmail, it's because 99% of the time signatures are
>> worthless.  They contribute to the illusion of data integrity while
>> actually providing no guarantees.
> 
> You mix up the absence of a guarantee with being worthless.

Show me the worth in a signed message that has any of (a) an incorrect signature, (b) from an invalid key, or (c) from someone you believe is utterly untrustworthy.