[Dovecot] Check if a message has attachments

[Antoine Nguyen]

Hi all,

my question is not specific to Dovecot but to the IMAP protocol in general.

I'm working on a web based software that provides a simple webmail (
http://modoboa.org/). I'm wondering what would an efficient way to detect if
a message (or a group of messages) has attachments. I know it certainly
consists in checking for specific MIME constructions but how to achieve that
without fetching the whole body for each message?

Thanks in advance,

Antoine Nguyen