Postfix / Dovecot / Raspbian empfängt keine E-Mails von außen, nur IPv6

Hey alle zusammen :) Ich experimentiere mit meinem Raspberry Pi, um ihn als Mailserver einzurichten. Ich verwende dynv6.net nur als dynamischen DNS-Provider für IPv6, da ich nur Dual Stack Lite zu Hause habe. Die Ports für den E-Mail-Server sind geöffnet. Und ich kann E-Mails an anyadress@mail.de über den Pi senden (verwendet IPv6), die gut ankommen. Ich kann jedoch keine E-Mails von außen erhalten. Der DNS-MX-Eintrag ist für diese Domäne festgelegt. Ich erhalte bis jetzt keine Fehler von meinem E-Mail-Anbieter. Können Sie mir bitte helfen, den Fehler zu finden? Hier ist meine main.cf von postfix:

 ## See /usr/share/postfix/main.cf.dist for a commented, more complete version  inet_protocols = ipv6  # 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 $mail_name (Raspbian) biff = no  # appending .domain is the MUA's job. append_dot_mydomain = no  # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h  readme_directory = no  # See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on # fresh installs. compatibility_level = 2  # TLS parameters smtpd_tls_cert_file=/etc/ssl/certs/emailserv.crt smtpd_tls_key_file=/etc/ssl/private/emailserv.key smtpd_use_tls=yes smtpd_tls_session_cache_database = btree:$/smtpd_scache smtp_tls_session_cache_database = btree:$/smtp_scache smtpd_tls_received_header = yes smtpd_tls_mandatory_protocols = SSLv3, TLSv1 smtpd_tls_mandatory_ciphers = medium smtpd_tls_auth_only = yes tls_random_source = dev:/dev/urandom   # 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 = Kaito-RasPi mydomain = futuregadgetlab.dynv6.net alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases mydestination = $myhostname, Kaito-RasPi, localhost.localdomain, localhost, futuregadgetlab.dynv6.net #relayhost =  mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all #inet_protocols = all home_mailbox = Maildir/ smtpd_sasl_auth_enable = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/dovecot-auth smtpd_sasl_authenticated_header = yes smtpd_sasl_local_domain = $myhostname broken_sasl_auth_clients = yes smtpd_recipient_restrictions = reject_unknown_sender_domain reject_unknown_recipient_domain reject_unauth_pipelining permit_mynetworks permit_sasl_authenticated reject_unauth_destination smtpd_sender_restrictions = reject_unknown_sender_domain permit_sasl_authenticated mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/conf.d/01-mail-stack-delivery.conf -m "$" virtual_alias_maps = hash:/etc/postfix/virtual 

und hier master.cf:

 # # Postfix master process configuration file. For details on the format # of the file, see the master(5) manual page (command: "man 5 master" or # on-line: http://www.postfix.org/master.5.html). # # Do not forget to execute "postfix reload" after editing this file. # # ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (no) (never) (100) # ========================================================================== smtp inet n - y - - smtpd smtps inet n - y - - smtpd #smtp inet n - y - 1 postscreen #smtpd pass - - y - - smtpd #dnsblog unix - - y - 0 dnsblog #tlsproxy unix - - y - 0 tlsproxy submission inet n - y - - smtpd # -o syslog_name=postfix/submission # -o smtpd_tls_security_level=encrypt # -o smtpd_sasl_auth_enable=yes # -o smtpd_reject_unlisted_recipient=no # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o smtpd_helo_restrictions=$mua_helo_restrictions # -o smtpd_sender_restrictions=$mua_sender_restrictions # -o smtpd_recipient_restrictions= # -o smtpd_relay_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #smtps inet n - y - - smtpd # -o syslog_name=postfix/smtps # -o smtpd_tls_wrappermode=yes # -o smtpd_sasl_auth_enable=yes # -o smtpd_reject_unlisted_recipient=no # -o smtpd_client_restrictions=$mua_client_restrictions # -o smtpd_helo_restrictions=$mua_helo_restrictions # -o smtpd_sender_restrictions=$mua_sender_restrictions # -o smtpd_recipient_restrictions= # -o smtpd_relay_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #628 inet n - y - - qmqpd pickup unix n - y 60 1 pickup cleanup unix n - y - 0 cleanup qmgr unix n - n 300 1 qmgr #qmgr unix n - n 300 1 oqmgr 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 # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 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 # # ==================================================================== # Interfaces to non-Postfix software. Be sure to examine the manual # pages of the non-Postfix software to find out what options it wants. # # Many of the following services use the Postfix pipe(8) delivery # agent. See the pipe(8) man page for information about $ # and other message envelope options. # ==================================================================== # # maildrop. See the Postfix MAILDROP_README file for details. # Also specify in main.cf: maildrop_destination_recipient_limit=1 # maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/bin/maildrop -d $ # # ==================================================================== # # Recent Cyrus versions can use the existing "lmtp" master.cf entry. # # Specify in cyrus.conf: # lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4 # # Specify in main.cf one or more of the following: # mailbox_transport = lmtp:inet:localhost # virtual_transport = lmtp:inet:localhost # # ==================================================================== # # Cyrus 2.1.5 (Amos Gouaux) # Also specify in main.cf: cyrus_destination_recipient_limit=1 # #cyrus unix - n n - - pipe # user=cyrus argv=/cyrus/bin/deliver -e -r $ -m $ $ # # ==================================================================== # Old example of delivery via Cyrus. # #old-cyrus unix - n n - - pipe # flags=R user=cyrus argv=/cyrus/bin/deliver -e -m $ $ # # ==================================================================== # # See the Postfix UUCP_README file for configuration details. # uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient) # # Other external delivery methods. # 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 $ $ $ mailman unix - n n - - pipe flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py $ $