Fresh installed virtualmin. Gets Emails, but doesn't send any

Installed latest virtualmin on Ubuntu 16.04 and imap email is working, smtp won’t.

I checked maillog and it said:
SASL LOGIN authentication failed: generic failure

saslfinger -s says:

saslfinger - postfix Cyrus sasl configuration Sat Sep 24 14:20:23 CEST 2016 version: 1.0.4 mode: server-side SMTP AUTH

– basics –
Postfix: 3.1.0
System: Ubuntu 16.04.1 LTS \n \l

– smtpd is linked to –
libsasl2.so.2 => /usr/lib/x86_64-linux-gnu/libsasl2.so.2 (0x00007f7d70ec7000)

– active SMTP AUTH and TLS parameters for smtpd –
broken_sasl_auth_clients = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes

– listing of /usr/lib/sasl2 –
total 16
drwxr-xr-x 2 root root 4096 Sep 22 23:08 .
drwxr-xr-x 48 root root 4096 Sep 22 23:57 …
-rw-r–r-- 1 root root 4 Sep 22 23:08 berkeley_db.active
-rw-r–r-- 1 root root 4 Apr 5 15:40 berkeley_db.txt

– listing of /etc/postfix/sasl –
total 12
drwxr-xr-x 2 root root 4096 Sep 22 23:10 .
drwxr-xr-x 3 root root 4096 Sep 23 20:49 …
-rw-r–r-- 1 root root 49 Sep 22 23:10 smtpd.conf

– content of /etc/postfix/sasl/smtpd.conf –
pwcheck_method: saslauthd
mech_list: plain login

– content of /etc/postfix/sasl/smtpd.conf –
pwcheck_method: saslauthd
mech_list: plain login

– active services in /etc/postfix/master.cf –

service type private unpriv chroot wakeup maxproc command + args

(yes) (yes) (no) (never) (100)

smtp inet n - y - - smtpd -o smtpd_sasl_auth_enable=yes
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
${nexthop} ${user}

submission inet n - y - - smtpd -o smtpd_sasl_auth_enable=yes

– mechanisms on localhost –
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN

– end of saslfinger output –

What am i missing?

Thanks and best