It wasn't until I'd noticed that sending the email I just posted took a
long time to send that I found that the PDF attachment was a 512K file.
As it was only one page of fairly simple text (with a form included), I
did not think of its size being a possible problem. If I had noticed its
size beforehand, I probably would NOT have sent the attachment to
everyone. I hope it does not cause problems for any of the recipients.