Aha! So the solution is the thing I asked about in my second post, above (“As an alternative...”).

I’ve downloaded the add-in, and got it to work – once I’d worked out that you have to save the master mail merge document as a template in order to get all the formatting right in the split output documents. (I tried using a couple of the macros lower down the page, before resorting to downloading the add-in, but got errors reported when I ran them – probably something to do with compatibility with the version of Word I'm using.)

Thank you – I now have a working solution.

I still find it a little strange that you have to use an add-in, and then a separate macro, to achieve the end of putting text in the body of the e-mail when you send a merged Word document as an attachment. The standard options in Word, in the ‘Merge to E-mail’ dialogue when you select ‘Attachment’ under ‘Mail format’, really should include at least the ability to add some text (even if only unmerged text, the same for every recipient) into the body of the e-mail, and not just the subject line. I can’t imagine anyone, anywhere, ever, really wants to send e-mails with attachments but no text in the body.

However, the method (or rather, combination of methods) to which you’ve directed my attention will give greater flexibility than I was looking for, and will be useful in the future.

Cheers,

Martin