Mail merge with attachment

Hello,
I would like to send a mail merge email (with each email personalized with the client's name, first name, title, etc.) and an attachment (the same for everyone).
Unfortunately, Word does not allow sending a mail merge via email with an attachment.
I found a solution through a macro suggested by an internet user, using Outlook, but it does not work on my computer (and on two others where I also tried):
https://faqword.com/index.php/word-tutoriels/toutes-versions/670-publipostage-et-pj.html
If anyone has another solution, I would be interested.

Thank you for your responses,

Laurence.