formal self-intro and a small question

[Lawrence C. Chin]

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Hi, finally have a little time today to come back to the mailing list.

It's me, Lawrence, previously with that dummie kurtc1972 gmail
account. Now I'm not gonna use that anymore for this mailing list and
gpg communication as I'm getting serious with playing with this
enigmail. Just saying hi and introducing myself using this new email
bearing my full name etc for gpg use.

Well, while here, I might as well ask a question, though it's more
Enigmail-related. On the OpenPGP Options (OpenPGP security under my
account settings), I see the two options:

*use email address of this identity to identify OpenPGP key
*use specific OpenPGP key ID

I checked the second. But what's the difference between the two?

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=otqu
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