OK. This is weird! Something is joining those two lines.
diff --git a/dovecot/conf.d/10-mail.conf b/dovecot/conf.d/10-mail.conf
index b47235f..5b20997 100644
--- a/dovecot/conf.d/10-mail.conf
+++ b/dovecot/conf.d/10-mail.conf
@@ -27,7 +27,8 @@
#
# <doc/wiki/MailLocation.txt>
#
-mail_location = mbox:~/mail:INBOX=/var/mail/%u
+#mail_location = mbox:~/mail:INBOX=/var/mail/%u
+mail_location = maildir:~/Maildir:INBOX=~/Maildir/INBOX:LAYOUT=fs
# If you need to set multiple mailbox locations or want to change default
# namespace settings, you can do it by defining namespace sections.
@@ -47,6 +48,7 @@ namespace inbox {
# namespaces or some clients get confused. '/' is usually a good one.
# The default however depends on the underlying mail storage format.
#separator =
+ separator = /
# Prefix required to access this namespace. This needs to be different for
# all namespaces. For example "Public/".
I've tried removing the trailing space on the original commented
separator =
