Postfix sendet keine Mails

Oct 22 11:05:28 nagios postfix/smtp[2004]: 3BAE01C21A2: to=<testuser@***-*******.de>, relay=192.168.***.**[192.168.***.**]:25, delay=0.17, delays=0.13/0/0/0.03, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as ED564A1E288)
Oct 22 11:05:28 nagios postfix/qmgr[1990]: 3BAE01C21A2: removed

# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = nagios.***-********.net
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = nagios.***-********.net, localhost.$mydomain
relayhost = 192.168.***.**
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = localhost