Could I write a page that, if I send an email to a specific address (obviously an address associated with my website) containing a specific set of syntax, it receives the email, reads the contents, safety-checks the contents, then alters some part of the website’s content based on the contents of the email.
A theoretical usage might be…
I’m out and about with my iphone. I take a picture. I email it to email@example.com with the subject “^upload^” or some other code word then a space, then a word denoting a specific ‘album’.
ten seconds later my website has done the work of adding that picture to the appropriate album.