[Dovecot] Empty To: Header and message_address_parse

[Wolfgang.Friebel at desy.de]

Using dovecot 1.2beta (but earlier versions should behave similarly) we 
have a problem in conjunction with empty To: headers and the RT request 
tracker.

RT sends mail out using Bcc: and no To: header at all. To make some 
mailers happy one can configure to send a dummy To: header, which we do.

Our To header looks like:
To: "AdminCc of rt Ticket #123456":;

The message_address_parse function called with the TRUE flag 
(triggers add_fixed_address) in dovecot changes that to
To: AdminCc of rt Ticket #123456:  MISSING_MAILBOX at MISSING_DOMAIN ;

and then at least alpine does use that invalid address as Cc: address when 
replying. If the mail is stored in a local folder, i.e. does not get 
fetched via IMAP then the To: line is displayed as is and a reply does not 
result in an errorneous Cc:

This behaviour is at least inconsistent from a user point of view. Is 
there some advice other than change the RT mail header generation?

(other mailers seem to copy the To: line unaltered which results in an 
invalid address as well, therefore I admit that the real problem is with 
RT)
-- 
Wolfgang Friebel                   Deutsches Elektronen-Synchrotron DESY
Phone/Fax:  +49 33762 77372/216    Platanenallee 6
Mail: Wolfgang.Friebel AT desy.de  D-15738 Zeuthen  Germany