Hello, I would like to know if there is any milter for postfix that would let me query a CardDav server?
The idea is to add a custom header, for instance 'X-Address-Book: Personal' if the from email address is referenced in a personal carddav address book of the recipient. This will be used by a sieve filter, for instance to mark the emails as "Personal" / or "importants", al GMail, to keep them in the inbox. Otherwise, if you can point me in a direction on how to write this, I will be happy. I can write it in Go, C, Perl, Python, etc. I hope it's clear, thanks for your help. -- André Rodier https://github.com/progmaticltd/homebox
