I have searched for days now and have not come to a solution for this problem. The problem is that my client can't send email through my server. I myself do not have a problem with sending email. I know that port 25 is closed by the ISP of my client and it is not closed by my ISP. To solve the issue I added the following line in #/etc/postfix/master.cf: Code: 1984 inet n - - - - smtpd So now the top lines look like: Code: smtpd pass - - n - - smtpd smtp inet n - - - - smtpd smtps inet n - n - - smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_reject_unlisted_sender=yes -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject -o broken_sasl_auth_clients=yes #smtp inet n - - - - postscreen 1984 inet n - - - - smtpd tlsproxy unix - - n - 0 tlsproxy dnsblog unix - - n - 0 dnsblog I had my VPS provider make an rDNS value. I had them open up port 1984 (in the shared managed firewall they have for my server). Furthermore I made use of some help from other users involving securing email but I don't think that it was of much help. The issue remains. I suspect that my master.cf and main.cf of postfix contain errors but I am not experienced enough to see what that errors are. Perhaps somebody that knows a lot about these things can help me out. #/etc/postfix/master.cf: Code: smtpd pass - - n - - smtpd smtp inet n - - - - smtpd smtps inet n - n - - smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_reject_unlisted_sender=yes -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject -o broken_sasl_auth_clients=yes #smtp inet n - - - - postscreen 1984 inet n - - - - smtpd tlsproxy unix - - n - 0 tlsproxy dnsblog unix - - n - 0 dnsblog #628 inet n - - - - qmqpd pickup fifo n - - 60 1 pickup cleanup unix n - - - 0 cleanup qmgr fifo n - n 300 1 qmgr #qmgr fifo n - - 300 1 oqmgr tlsmgr unix - - - 1000? 1 tlsmgr rewrite unix - - - - - trivial-rewrite bounce unix - - - - 0 bounce defer unix - - - - 0 bounce trace unix - - - - 0 bounce verify unix - - - - 1 verify flush unix n - - 1000? 0 flush proxymap unix - - n - - proxymap proxywrite unix - - n - 1 proxymap smtp unix - - - - - smtp relay unix - - - - - smtp -o smtp_fallback_relay= # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 showq unix n - - - - showq error unix - - - - - error retry unix - - - - - error discard unix - - - - - discard local unix - n n - - local virtual unix - n n - - virtual lmtp unix - - - - - lmtp anvil unix - - - - 1 anvil scache unix - - - - 1 scache maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/bin/maildrop -d vmail ${extension} ${recipient} ${user} ${nexthop} ${sender} uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient) 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 ${nexthop} ${user} ${extension} mailman unix - n n - - pipe flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user} amavis unix - - - - 2 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes 127.0.0.1:10025 inet n - - - - smtpd -o content_filter= -o local_recipient_maps= -o relay_recipient_maps= -o smtpd_restriction_classes= -o smtpd_client_restrictions= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o mynetworks=127.0.0.0/8 -o strict_rfc821_envelopes=yes -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks -o smtpd_bind_address=127.0.0.1 policy-spf unix - n n - - spawn user=nobody argv=/usr/bin/policyd-spf #/etc/postfix/main.cf: Code: #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no #delay_warning_time = 4h readme_directory = /usr/share/doc/postfix smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_use_tls = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache myhostname = server1.biggee.nl alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases alias_database = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases myorigin = /etc/mailname mydestination = server1.biggee.nl, localhost, localhost.localdomain relayhost = mynetworks = 127.0.0.0/8 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all html_directory = /usr/share/doc/postfix/html virtual_alias_domains = virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf, hash:/var/lib/mailman/data/virtual-mailman virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf virtual_mailbox_base = /var/vmail virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = yes smtpd_sasl_authenticated_header = yes smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_tls_security_level = may transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf relay_domains = mysql:/etc/postfix/mysql-virtual_relaydomains.cf relay_recipient_maps = mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_do$ smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unknown_client_hostname, check_client_access mysql:/etc/postfix/mysql-virtual_client.cf smtpd_client_message_rate_limit = 100 smtpd_data_restrictions = reject_unauth_pipelining smtpd_delay_reject = yes maildrop_destination_concurrency_limit = 1 maildrop_destination_recipient_limit = 1 virtual_transport = maildrop header_checks = regexp:/etc/postfix/header_checks mime_header_checks = regexp:/etc/postfix/mime_header_checks nested_header_checks = regexp:/etc/postfix/nested_header_checks body_checks = regexp:/etc/postfix/body_checks owner_request_special = no content_filter = amavis:[127.0.0.1]:10024 receive_override_options = no_address_mappings smtpd_tls_CAfile = /usr/local/ispconfig/interface/ssl/startssl.chain.class1.server.crt postscreen_access_list = permit_mynetworks, cidr:/etc/postfix/postscreen_access.cidr postscreen_dnsbl_threshold = 8 postscreen_dnsbl_sites = dnsbl.ahbl.org*3 dnsbl.njabl.org*3 dnsbl.sorbs.net*3 pbl.spamhaus.org*3 cbl.abuseat.org*3 bl.spamcannibal.org*3 nsbl.inps.de*3 spamrbl.imp.ch*3 postscreen_dnsbl_action = enforce postscreen_greet_action = enforce My linux version: Linux server1.biggee.nl 2.6.32-44-server #98-Ubuntu SMP Mon Sep 24 17:41:33 UTC 2012 x86_64 GNU/Linux Distributor ID: Ubuntu Description: Ubuntu 10.04.4 LTS Release: 10.04 Codename: lucid I have set up my ISPConfig 3 server using the 'Perfect server setup for Ubuntu 10.04' Also I bought your ISPConfig 3 manual and printed it and I find it very helpful. One small thing though: It helps if there are pagenumbers in the index ;-)
Problem solved with update of ISPConfig 3 I traced the issue and found out that I had a mail error involving SASLAUTHD. I did not know what to do exactly so I hoped that an update of ISPConfig3 would solve the issue. And it did! Now it is not only working but updated to the latest release too. Kudos to this great system that goes by the name ISPConfig 3!
