Differences in "Delivered-To" header between deliver and LMTP

[Reindl Harald]

Am 09.07.2014 20:20, schrieb Jeff Rice:
> I'm transitioning my server over from using the deliver LDA and LMTP.  Suddenly a bunch of sieve filters stopped
> working, and I noticed the contents of the Delivered-To header are different.
> 
> Using Dovecot's deliver LDA, the contents are a bare email address (foo at bar.com).  Using Dovecot LMTP, they are in
> brackets (<foo at bar.com>).  Is there a reason why this isn't consistent between the two delivery agents?  It seems
> like it ought to be

LMTP is practically SMTP

http://www.faqs.org/rfcs/rfc2822.html

A mailbox receives mail.  It is a conceptual entity which does not
   necessarily pertain to file storage.  For example, some sites may
   choose to print mail on a printer and deliver the output to the
   addressee's desk.  Normally, a mailbox is comprised of two parts: (1)
   an optional display name that indicates the name of the recipient
   (which could be a person or a system) that could be displayed to the
   user of a mail application, and (2) an addr-spec address enclosed in
   angle brackets ("<" and ">").  There is also an alternate simple form
   of a mailbox where the addr-spec address appears alone, without the
   recipient's name or the angle brackets.  The Internet addr-spec
   address is described in section 3.4.1.

   Note: Some legacy implementations used the simple form where the
   addr-spec appears without the angle brackets, but included the name
   of the recipient in parentheses as a comment following the addr-spec.
   Since the meaning of the information in a comment is unspecified,
   implementations SHOULD use the full name-addr form of the mailbox,
   instead of the legacy form, to specify the display name associated
   with a mailbox.  Also, because some legacy implementations interpret
   the comment, comments generally SHOULD NOT be used in address fields
   to avoid confusing such implementations.

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