On Sat, Nov 28, 2020 at 03:04:38PM -0700, @lbutlr wrote:
> > There is no configuration parameter to lowercase email addresses in the
> > postfix lmtp client. You should be able to configure dovecot to accept
> > case insensitive email addresses. It should do that by default in recent
> > versions. I believe the parameter to look into is auth_username_format.
>
> Postfix folds usernames to lowercase and this cannot be changed
> *unless this has changed in the also couple of years?). Are you saying
> that LMTP in postfix behaves differently than local(8)?
Yes, downcasing of recipient addresses is a feature of the local(8)
delivery agent, and is generally not done elsewhere in Postfix.
Keys for table lookups in fixed-key (rather than key pattern such as
regexp, PCRE, ...) tables are folded to lower-case, but the results
are are used verbatim.
Keys are passed verbatim to pattern-based tables, but these default
to case-insensitive matching (use "/i" to disable in PCRE and regexp).
> Postfix lookups are not case sensitive, so USER will match user.
Actually, Postfix works hard to avoid case-folding, especially for
messages that transit the MTA and are not delivered locally.
--
Viktor.
