save failed to open mailbox quarantine

[Eggert Ehmke FTV Spandau]

I use postfix. The folder name is still uppercase when forwarded to dovecot, as 
can be seen in /var/log/mail.log.

Am Montag, 14. November 2016, 15:20:40 schrieb Steffen Kaiser:
> - gpg control packet
> 
> On Mon, 14 Nov 2016, Eggert Ehmke FTV Spandau wrote:
> > I have dovecot 2.2.13 set up with spamassassin and amavis. This works fine
> > so far, Spam emails are forwarded to "username+Quarantine at mydomain.de".
> > The recipient_delimiter=+ is set, the Quarantine folder exists. However,
> > Dovecot tries to deliver it to a folder quarantine, that does not exist.
> > In the dovecot-deliver.log there are these lines:
> > 
> > Nov 14 14:16:13 lda(username at mydomain.de): Info:
> > msgid=<2707212.2aHC3KDWrN at wookie>: save failed to open mailbox quarantine:
> > Mailbox doesn't exist: quarantine
> > Nov 14 14:16:13 lda(username at mydomain.de): Info:
> > msgid=<2707212.2aHC3KDWrN at xxxxxx>: saved mail to INBOX
> > 
> > Indeed the message is found in the inbox. What can be done so the folder
> > name is not converted to lower case?
> 
> which MTA you are using? sendmail?
> 
> By default sendmail lowercases the local part, see mailer flags "u".
> 
> --
> Steffen Kaiser