am client ist der Benutzername eingetragen und "Verschlüsselung Nie"
Mit "Erweiterte Konfiguration" meins Du wohl die Postfix-Konfiguration
Die main.cf sieht so aus:
# 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
myhostname = mail.alizee-reisen.de
mydomain = alizee-reisen.de
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.
#SMTP Auth
#SMTP mit SASL-Authentification verwenden
smtp_sasl_auth_enable = yes
#Die Paßwörter stehen in der Datei /etc/postfix/smtp_auth
smtp_sasl_password_maps = hash:/etc/postfix/smtp_auth
#Zusatz-Optionen: Keine anonyme-Anmeldung verwenden
smtp_sasl_security_options = noanonymous
#Den Relayhost (der Server der unsere Emails annehmen soll)
relayhost = auth.smtp.kundenserver.de
mailbox_command =
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
#transport_maps = hash:/etc/postfix/transport
mydestination = $mydomain, $myhostname, alizee-linuxsrv1, localhost.$mydomain, localhost
myorigin = $mydomain
#relayhost = smtp.1und1.de
mynetworks_style = subnet
mynetworks = 127.0.0.0/8, 192.168.10.0/99
mailbox_size_limit = 0
recipient_delimiter =
inet_interfaces = all
inet_protocols = all
mail_owner = postfix
home_mailbox = Maildir/
Ist Postfix für das login verantwortlich?
Grüße alizee