I've created a spreadsheet and macro - using the excellent info provided by
Ron de Bruin on his website - to automatically send an email message to
various recipients on dates which are calculated on the spreadsheet.

The next step is to set this up so the file opens every day, the macro runs
and generates emails if appropriate then closes the file.

I thought of doing something like putting the file in the Start menu, naming
the macro Auto_Open and adding some code at the end of the macro to close the
file.

However, I'm concerned that on days a message is due to be sent this could
happen as many times as the computer is booted up plus if the user (not me)
needs to change the dates on the sheet opening the file would run the macro
(and possibly re-send mails) again.

I would be grateful for any suggestions as to how to achieve what I want and
how best to code it.

Many thanks in anticipation