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Topic: change attachments in mail

Good day, I encountered a problem that users cannot send large letters to other mail servers. Is it possible to make a system like Gmail. So that when sending a letter, the server replaces the attachment with a link to it and sends the attachment itself to cloud storage

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Re: change attachments in mail

Sure it could be implemented with a milter program, but you can also ask users to upload large attachments to cloud storage like NextCloud / ownCloud first, then copy the link and paste in email, then send it out.