[Dovecot] [PATCH] LMTP: Permit user IDs containing recipient_delimiter

Ulrich Zehl ulrich-dovecot at topfen.net
Fri Jan 18 18:43:35 EET 2013

On Tue, Jan 15, 2013 at 08:44:57AM +0200, Timo Sirainen wrote:
> On Sat, 2013-01-12 at 17:45 +0100, Ulrich Zehl wrote:
> > The Dovecot 2.1 LMTP server currently always strips the address extension
> > from a recipient address (if recipient_delimiter is set), meaning user IDs
> > cannot contain the recipient delimiter character, e.g. "user+foo" is not
> > supported.
> > 
> > This was surprising for me, as Postfix behaves differently in this regard:
> > It first looks up "user+foo", and only then "user".
> > 
> > The attached patch works for me and brings Dovecot's behavior in line with
> > Postfix. Please let me know what you think about it.
> What do you need this for? Do you really have usernames that have '+'
> characters? Sounds like a bad idea. In Postfix it makes more sense,
> because you might want user+ext to be delivered differently, but with
> Dovecot you can do this in Sieve.

My recipient_delimiter is actually '-', and I have a number of usernames
that contain this character. I'd like to avoid having to change them.

Additionally, I currently seperate address-lists@ and address-spam@ into
two different mailboxes (accounts), something I'd also like to keep.

But if you don't find these changes useful, I'll just go back to using LDA
where this was/is possible. Easier to maintain than patching.

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