[Dovecot] [Q] IMAP update message header?

[Roderick A. Anderson]

More about IMAP, less about Dovecot.

This is more an IMAP question than specifically about Dovecot.  Sorry to 
ask here but I've been researching, reading and lurking with no answer 
so far.

What I'm doing is running reports as a user from a remote system to 
provide a list of messages (Sender/From, Subject, Date, size) in a 
specific folder(?).  In one case it isn't even a Dovecot based server so 
I only have access as a client. (Though I use Dovecot on several other 
systems and will need this capability for them.)

When a message in the folder has been reported I'd like to add a 
X-Header-??? indicating that the message has been reported so the next 
time through it isn't reported again.  (After the message is X days old 
it is deleted.)

These reports are run using Perl and I've tried most every CPAN module 
available but haven't figured out how to change/add a header then save 
the message back.  So far I haven't been able to determine if this is 
even possible by reading the RFCs.

Is there a method as a client from a remote system to make changes to a 
message then save it back?  What is the IMAP verb, command, etc. to do 
this?  Or if there are Perl programmers on the list a brief description 
(or code) for doing this?


TIA (and sorry for the off topic posting),
Rod
--