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

[Jeff Rice]

I don't know if there is a convention for whether the brackets should be 
included or not.  But consistency is a virtue.  The MTA in question is 
Postfix 2.9.6.  I assumed it was the Dovecot LDA adding the Delivered-To 
header because it was rewritten when I did a redirect in sieve, but 
redirect must put the message back into Postfix's queue where the header 
gets added (or replaced, in this case).

Maybe other folks can chime in if they see emails in brackets (<>) or 
not for this type of header for other MTAs and we can get a sense of 
which is more common.

Jeff

> Timo Sirainen <mailto:tss at iki.fi>
> July 10, 2014 at 11:29 AM
>
> Oh, that's annoying. Dovecot LDA doesn't actually add this header, it 
> was your MTA that added it. But looks like I hadn't checked what the 
> MTAs actually write to the header when I added this feature to LMTP, 
> and nobody had mentioned this before either. I wonder if anybody's 
> system breaks if I just change it now..
>
> Jeff Rice <mailto:jeff at jrice.me>
> July 9, 2014 at 2:20 PM
> Hi,
> 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.
>
> Jeff
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