What mailing services are there that allow you to send your own file to everyone?

Question

Email

There are 100 recipients and each letter needs to attach several files. You need the ability to create a correspondence between recipients and files. Is there a ready-made solution with a convenient setting?

Answer 1

Just to attach? And how many files per user?
The simplest solution is through additional fields, this functionality is available almost everywhere. The path to the file, in this case, will look like site.com/*filename*.pdf, where instead of filename, each subscriber will be assigned a specific file number.