Is it possible to forward from one mailbox to another?

Question

gmail

Good day. The site has a form. After sending it, the user should receive a catalog, but this catalog (message) should be automatically sent from the customer's mailing address. In addition to this form, there are others where the file is not required.
Is it even possible to implement this?

Answer 1

Those. the site should send mail on behalf of a heap of customers to the client?
In general, it is possible if the owners of mail domains agree to register the IP address of your server in SPF, that is. make you a trusted email address for their domain.
This is assuming I understand the question correctly. (The presence or absence of the file is irrelevant)