search for: anyheader

I'm thinking about adding at least one new SEARCH command extension to Dovecot: ability to search from any headers in the mail, including MIME headers in the body. So the idea is that you could somewhat quickly ask e.g. "show me all mails with pdf attachments": a search or x-anyheader application/pdf x-anyheader .pdf b fetch $ bodystructure The client can verify the results with the fetch. The "x-anyheader" can already be implemented without changes to full text search plugin, because all backends store message/MIME headers and body text separately. So, questions for...