Nextcloud mail app config error

[dnutan (Marc)]

You can try enabling logging in /usr/share/nextcloud/config/config.php:

@dnutan

furhter logging can be obtained ( horde_imap.log, horde_smtp.log ) adding:

'app.mail.imaplog.enabled' => true,
'app.mail.smtplog.enabled' => true,

and see if /var/lib/nethserver/nextcloud/horde_imap.log gives more info.