doveadm backup + ISO 8859-1 mailbox name

[Michael Goth]

Hi!

I'm trying to migrate a mailbox from an old IMAP server (not Dovecot) to 
a new Dovecot server with 'doveadm backup'. The command fails because of 
an unexpected character in a mailbox name:


doveadm -o imapc_user=ag at example.org \
         -o imapc_password=XXX \
         -o imapc_host=old-mailserver.webflow.de \
         -o imapc_port=993 \
         -o imapc_ssl=imaps \
         -o imapc_ssl_verify=no \
         -o imapc_features=rfc822.size,fetch-headers \
         -o ssl_client_ca_dir=/etc/ssl \
         backup -R -f -x ~* -u migration-ag at example.org imapc:

dsync(migration-ag at example.org): Info: 
imapc(old-mailserver.webflow.de:993): Connected to 1.1.1.1:993 (local 
2.2.2.2:46154)
dsync(migration-ag at example.org): Error: Failed to access mailbox 
Entw?rfe: mailbox does not exist


The problem is with "Entw?rfe" here. It's actually Entw<0xfc>rfe, which 
translates to "Entwürfe" in ISO-8859-1.

Why can't doveadm find that mailbox? Is the old mailserver misbehaving 
(I hope not because I have no idea how to change that...), or does this 
happen on the new server? Can I tell doveadm something that makes this work?


Thank you

Michael



-- 
Michael Goth

.webflow GmbH

Geschäftsführer: Andreas Schrei
Wasserburger Straße 4
D - 83352 Altenmarkt a. d. Alz

Amtsgericht Traunstein HRB 18537

E-Mail:   mg at webflow.de
Tel:      +49 (0) 8621 - 99989 - 26
Fax:      +49 (0) 8621 - 99989 - 28
Web:      www.webflow.de