Brandon,
No problem. It's provided for in the original RFC822 letter format, under 'comments'. Save Joe Gibbs's address in your Address Book as
Josiah Gibbs <josiah(willard)gibbs@mac.com>
.
.
.
Long Explanation
If you write a person's name in your Address Book as
Josiah Willard Gibbs <josiahgibbs@mac.com>, it will appear in his mailbox as
To: Josiah Willard Gibbs
as Mulder has remarked. You don't want this. However, if you write his address in Address Book as
Josiah Gibbs <josiah(willard)gibbs@mac.com>, Apple Mail will automatically leave out the string in parentheses (a comment) and prepare a letter
To: Josiah Gibbs <josiahgibbs@mac.com>
instead.
Other permutations don't work, for adding the middle name in the way of Mulder places it within quotes, which override the parentheses; and addressing it "Josiah" (Willard) "Gibbs" <jos... .> causes Apple Mail to view it as a comment, but append it to the sent letter:
To: Josiah Gibbs (Willard)
which appears a bug to me.
Long ago, one prepared one's own mailing envelopes (with 'mh', for example). In this case, a Kindergarden teacher might address a letter to
(Cecelia's mother) "Mary Seafoam" <mseafoam@uunet.net>
The letter would be sent to 'Mary Seafoam', but it would be saved on the teacher's account as the above. This made it easier to understand the meaning of long-archived mail. This, I suspect, was the original purpose of the parenthesis comment, but I'm not sure. In any case, it would be nice if Apple saved the original shown above to SENT, and mailed & saved the abbreviated address in INBOX.
Bruce
Little dots added by bb.