I wrote the beginnings of a feed in PHP that used email to communicate. But I never got further than that. I encrypted XML files inside email attachments and

I wrote the beginnings of a feed in PHP that used email to communicate. But I never got further than that. I encrypted XML files inside email attachments and the system relied on a client that interpreted them. I had a file system mailbox which sent items whenever they appeared in the folder by email to the email addresses in the XML.