I am using mail merge in word and an exisitng excel spread sheet. It never
asks me for the field in the excel spread sheet to be designated as the email
address for the merged mail.
Are you executing the merge to email? You will not be asked for the field
containing the email address if the merge is being executed to any other
destination.

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Hope this helps.
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Doug Robbins - Word MVP
>I am using mail merge in word and an exisitng excel spread sheet. It never
> asks me for the field in the excel spread sheet to be designated as the
> email
> address for the merged mail.