postfix / dovecot Relay-Zugriff abrupt (für einige virtuelle Hosts)

Während alles funktionierte, können heute 3 von 10 Domains auf meinem vps Ubuntu-Server (Postfix / dovecot) keine E-Mails aus Outlook senden und erhalten Relay-Zugriff verweigert. Es wurden keine Änderungen vorgenommen. (alle Domains haben bis heute normal funktioniert)

Mail.log Oct 24 22:27:43 mail postfix/smtpd[7662]: connect from my.desk.top.ip Oct 24 22:27:43 mail postfix/smtpd[7662]: warning: connect to Milter service inet:localhost:8891: Connection refused Oct 24 22:27:44 mail postfix/smtpd[7662]: NOQUEUE: reject: RCPT from my.desk.top.ip: 554 5.7.1 <receipt@email.com>: Relay access denied; from=<info@problematicdomain.com> to=<receipt@email.com> proto=ESMTP helo=<DESKTOPFTP67QJ> Oct 24 22:27:46 mail postfix/smtpd[7662]: disconnect from my.desk.top.ip 

Dovecot.log

Oct 24 22:27:12 auth: Debug: passwd-file(info@problematicdomain.com,my.desk.top.ip,<pLSYw1BcsgBeQ1jL>): lookup: user=info@problematicdomain.com file=/etc/dovecot/passwd Oct 24 22:27:12 auth: Debug: client passdb out: OK 1 user=info@problematicdomain.com Oct 24 22:27:12 auth: Debug: master in: REQUEST 997982209 7658 1 effa60cd62c34b72950ad17e6f08066c session_pid=7661 Oct 24 22:27:12 auth: Debug: passwd-file(info@problematicdomain.com,my.desk.top.ip,<pLSYw1BcsgBeQ1jL>): lookup: user=info@problematicdomain.com file=/etc/dovecot/users Oct 24 22:27:12 auth: Debug: master userdb out: USER 997982209 info@problematicdomain.com uid=5000 gid=5000 home=/var/spool/vmail/problematicdomain.com/ Oct 24 22:27:12 pop3-login: Info: Login: user=<info@problematicdomain.com>, method=PLAIN, rip=my.desk.top.ip, lip=172.31.1.100, mpid=7661, TLS, session=<pLSYw1BcsgBeQ1jL> Oct 24 22:27:12 pop3(info@problematicdomain.com): Info: Disconnected: Logged out top=0/0, retr=0/0, del=0/13, size=15495 

postfix main.cf

smtpd_sasl_auth_enable = yes 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  myhostname = mail.servermaindomain.gr mydestination = mail.servermaindomain.gr, localhost.servermaindomain.gr, localhost alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = $myhostname mynetworks = 127.0.0.0/8, 10.0.0.0/24 mailbox_size_limit = 0 home_mailbox = Maildir/ virtual_mailbox_domains = /etc/postfix/vhosts virtual_mailbox_base = /var/spool/vmail virtual_mailbox_maps = hash:/etc/postfix/vmaps virtual_minimum_uid = 1000 virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 recipient_delimiter = + inet_interfaces = all inet_protocols = ipv4 broken_sasl_auth_clients = yes #smtpd_sasl_local_domain = $myhostname smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth #smtpd_sasl_path = auth/dovecot smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination virtual_alias_maps = hash:/etc/postfix/virtual message_size_limit = 26240000  # DKIM # -------------------------------------- milter_default_action = accept milter_protocol = 2 smtpd_milters = inet:localhost:8891 non_smtpd_milters = inet:localhost:8891