Yes - in the Mail Merge Helper,

However, you may need to lower your expectations about the results. In Word
2000, you can either merge to plain text (i.e. the messages have a plain
text e-mail body) or merge to a blank message with an attachment.

Either start the Mail Merge Helper and choose option (3) Merge..., then
select Electronic Mail from the list, or in the MailMerge toolbar, click the
Merge... icon and choose the Electronic Mail option from thedropdown.

If the Electronic Mail option is not available or greyed out, have a look at

http://tips.pjmsn.me.uk/t0002.htm