Hi! I have the following setup that I recently installed ISPconfig on: vServer Strato Debian Etch ISPconfig 2.2.7 The assumed domain name here is domain.tld My postfix/main.cf is the following (xxxxx replaces the server name) Code: Datei: /etc/postfix/main.cf myhostname = xxxxxxxx.stratoserver.net alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname #mydestination = xxxxxxxx.stratoserver.net, xxxxxxxx.stratoserver.net, localhost.stratoserver.net, localhost relayhost = mynetworks = 127.0.0.0/8 mailbox_command = mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all inet_protocols = all smtpd_sasl_local_domain = smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination smtpd_tls_auth_only = no smtp_use_tls = yes smtp_tls_note_starttls_offer = yes smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout = 3600s tls_random_source = dev:/dev/urandom home_mailbox = Maildir/ virtual_maps = hash:/etc/postfix/virtusertable mydestination = /etc/postfix/local-host-names The Problem I am having is that when I try to send e-Mail via Outlook, I get the following e-mail back: Code: Your message did not reach some or all of the intended recipients. Subject: Wir prüfen Sent: 02.12.2008 16:35 The following recipient(s) cannot be reached: '[email protected][email protected] And the e-mail doesn't get sent. When I send an e-mail TO the account, I get the following e-Mail back: Code: Reporting-MTA: dns; xxxxxxx.stratoserver.net X-Postfix-Queue-ID: 5A3AD21838A X-Postfix-Sender: rfc822; [email protected][email protected][email protected] Now, this is only my second server I've ever administered and I may have made a misstake. On my other server, when ISPconfig asked me what server name and domain I wanted to use, I always used server1 as the server name and an assumed domain.tld the domain. But on this occasion I used xxxxxx.stratoserver.net instead of server1.domain.tld. Could that be the cause of the problem? EDIT: I have added A records for xxxxx.stratoserver.net, but the problem still exists.