Hello There, I need some help with my SMTP settings. I followed this tutorial to the 't': http://www.howtoforge.com/perfect-server-centos-5.6-x86_64-ispconfig-3 First the problem. I cannot connect to my SMTP externally from my server. If a telnet on the server I get a response but when I telnet on a separate machine I get "Unable to connect to remote host". After trying telnet I tried added my account to an email client with password authentication and still unable to connect. Here is some output information: postconf -a Code: cyrus dovecot postconf -A Code: cyrus postconf -m Code: btree cidr environ hash ldap mysql nis pcre pgsql proxy regexp static unix postconf -n Code: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases body_checks = regexp:/etc/postfix/body_checks broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix content_filter = amavis:[127.0.0.1]:10024 daemon_directory = /usr/libexec/postfix debug_peer_level = 2 header_checks = regexp:/etc/postfix/header_checks html_directory = no inet_interfaces = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mime_header_checks = regexp:/etc/postfix/mime_header_checks mydestination = isone.example.com, localhost, localhost.localdomain myhostname = isone.example.com mynetworks = 127.0.0.0/8 [::1]/128 nested_header_checks = regexp:/etc/postfix/nested_header_checks newaliases_path = /usr/bin/newaliases.postfix proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES receive_override_options = no_address_mappings relay_domains = mysql:/etc/postfix/mysql-virtual_relaydomains.cf relay_recipient_maps = mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf sample_directory = /usr/share/doc/postfix-2.3.3/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_client_restrictions = check_client_access mysql:/etc/postfix/mysql-virtual_client.cf smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf, reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_sasl_path = private/auth smtpd_sasl_type = dovecot smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_tls_security_level = may smtpd_use_tls = yes transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf unknown_local_recipient_reject_code = 550 virtual_alias_domains = virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf virtual_gid_maps = static:5000 virtual_mailbox_base = /var/vmail virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf virtual_transport = dovecot virtual_uid_maps = static:5000 dovecot -n Code: # 1.2.17: /etc/dovecot.conf # OS: Linux 2.6.18-238.el5 x86_64 CentOS release 5.6 (Final) ext3 log_timestamp: %Y-%m-%d %H:%M:%S login_dir: /var/run/dovecot/login login_executable(default): /usr/libexec/dovecot/imap-login login_executable(imap): /usr/libexec/dovecot/imap-login login_executable(pop3): /usr/libexec/dovecot/pop3-login first_valid_uid: 5000 last_valid_uid: 5000 first_valid_gid: 5000 last_valid_gid: 5000 mail_location: maildir:/var/vmail/%d/%n/Maildir mail_executable(default): /usr/libexec/dovecot/rawlog /usr/libexec/dovecot/imap mail_executable(imap): /usr/libexec/dovecot/rawlog /usr/libexec/dovecot/imap mail_executable(pop3): /usr/libexec/dovecot/rawlog /usr/libexec/dovecot/pop3 mail_plugins(default): quota imap_quota mail_plugins(imap): quota imap_quota mail_plugins(pop3): quota mail_plugin_dir(default): /usr/lib/dovecot/imap/ mail_plugin_dir(imap): /usr/lib/dovecot/imap/ mail_plugin_dir(pop3): /usr/lib/dovecot/pop3 lda: postmaster_address: [email protected] mail_plugins: sieve quota mail_plugin_dir: /usr/lib/dovecot/lda auth_socket_path: /var/run/dovecot/auth-master auth default: mechanisms: plain login passdb: driver: pam passdb: driver: sql args: /etc/dovecot-sql.conf userdb: driver: passwd userdb: driver: sql args: /etc/dovecot-sql.conf socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix master: path: /var/run/dovecot/auth-master mode: 384 user: vmail plugin: quota: maildir sieve_dir: ~/sieve telnet localhost 25 Code: Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. 220 isone.example.com ESMTP Postfix ehlo localhost 250-isone.example.com 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN netstat -tap Code: Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:imaps *:* LISTEN 7053/imap-login tcp 0 0 *:pop3s *:* LISTEN 7052/pop3-login tcp 0 0 localhost.localdomain:10024 *:* LISTEN 13137/amavisd (mast tcp 0 0 localhost.localdomain:10025 *:* LISTEN 13106/master tcp 0 0 *:mysql *:* LISTEN 13035/mysqld tcp 0 0 *:pop3 *:* LISTEN 7052/pop3-login tcp 0 0 localhost.local:dyna-access *:* LISTEN 13153/clamd tcp 0 0 *:imap *:* LISTEN 7053/imap-login tcp 0 0 *:sunrpc *:* LISTEN 4608/portmap tcp 0 0 site09.COM:domain *:* LISTEN 13254/named tcp 0 0 site08.COM:domain *:* LISTEN 13254/named tcp 0 0 site07.COM:domain *:* LISTEN 13254/named tcp 0 0 site06.COM:domain *:* LISTEN 13254/named tcp 0 0 site05.COM:domain *:* LISTEN 13254/named tcp 0 0 site04.COM:domain *:* LISTEN 13254/named tcp 0 0 site03.COM:domain *:* LISTEN 13254/named tcp 0 0 site27.COM:domain *:* LISTEN 13254/named tcp 0 0 site26.COM:domain *:* LISTEN 13254/named tcp 0 0 site25.COM:domain *:* LISTEN 13254/named tcp 0 0 site24.COM:domain *:* LISTEN 13254/named tcp 0 0 site23.COM:domain *:* LISTEN 13254/named tcp 0 0 site22.COM:domain *:* LISTEN 13254/named tcp 0 0 site21.COM:domain *:* LISTEN 13254/named tcp 0 0 site20.COM:domain *:* LISTEN 13254/named tcp 0 0 site02.COM:domain *:* LISTEN 13254/named tcp 0 0 site19.COM:domain *:* LISTEN 13254/named tcp 0 0 site18.COM:domain *:* LISTEN 13254/named tcp 0 0 site17.COM:domain *:* LISTEN 13254/named tcp 0 0 site16.COM:domain *:* LISTEN 13254/named tcp 0 0 site15.COM:domain *:* LISTEN 13254/named tcp 0 0 site14.COM:domain *:* LISTEN 13254/named tcp 0 0 site13.COM:domain *:* LISTEN 13254/named tcp 0 0 site12.COM:domain *:* LISTEN 13254/named tcp 0 0 site11.COM:domain *:* LISTEN 13254/named tcp 0 0 site10.COM:domain *:* LISTEN 13254/named tcp 0 0 site01.COM:domain *:* LISTEN 13254/named tcp 0 0 site00.COM:domain *:* LISTEN 13254/named tcp 0 0 isone.example.com:domain *:* LISTEN 13254/named tcp 0 0 localhost.localdomai:domain *:* LISTEN 13254/named tcp 0 0 *:ftp *:* LISTEN 13202/pure-ftpd (SE tcp 0 0 *:ipp *:* LISTEN 4689/rpc.statd tcp 0 0 localhost.localdomain:rndc *:* LISTEN 13254/named tcp 0 0 *:smtp *:* LISTEN 13106/master tcp 0 0 localhost.localdomain:mysql localhost.localdomain:43268 ESTABLISHED 13035/mysqld tcp 0 0 localhost.localdomain:43268 localhost.localdomain:mysql ESTABLISHED 13151/amavisd (ch1- tcp 0 0 localhost.localdomain:35251 localhost.localdomain:mysql ESTABLISHED 13152/amavisd (ch1- tcp 56 0 localhost.localdomain:45914 localhost.localdomain:10025 CLOSE_WAIT 13151/amavisd (ch1- tcp 0 0 localhost.localdomain:mysql localhost.localdomain:35251 ESTABLISHED 13035/mysqld tcp 56 0 localhost.localdomain:56778 localhost.localdomain:10025 CLOSE_WAIT 13152/amavisd (ch1- tcp 0 0 *:imaps *:* LISTEN 7053/imap-login tcp 0 0 *:pop3s *:* LISTEN 7052/pop3-login tcp 0 0 *:pop3 *:* LISTEN 7052/pop3-login tcp 0 0 *:imap *:* LISTEN 7053/imap-login tcp 0 0 *:http *:* LISTEN 11219/httpd tcp 0 0 *:tproxy *:* LISTEN 11219/httpd tcp 0 0 *:domain *:* LISTEN 13254/named tcp 0 0 *:ftp *:* LISTEN 13202/pure-ftpd (SE tcp 0 0 *:ssh *:* LISTEN 6435/sshd tcp 0 0 localhost6.localdomain:rndc *:* LISTEN 13254/named tcp 0 0 *:pcsync-https *:* LISTEN 11219/httpd tcp 0 0 *:https *:* LISTEN 11219/httpd tcp 0 3888 isone.example.com:ssh h24-207-60-64.dlt.dcc:58191 ESTABLISHED 6849/0 iptables -L Code: Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination
Is there some other firewall (e.g. on your router) that blocks port 25? It is also possible that your ISP is blocking port 25.
Falko, you are right. The most obvious solution is sometimes the most difficult to see. I changed the SMTP port to 2525 and now things are working. My ISP must be blocking port 25. Need to get this corrected. Thank you for your help.
After checking with the ISP provider, they have assured me that port 25 is not being blocked. So I am still trying to figure out why my SMTP doesn't work on port 25.
No router installed. What is really odd is that when use a mail client to send and receive through port 2525 seems to be working fine. However, all emails that are sent out are addressed with the server name "[email protected]" and also "[email protected]". When sending an email from the system, localhost, using Java Mail and using SMTP setting mail.example.com through port 2525 all emails are marked as "Relay Access Denied". Do you think this has anything to do with my DNS settings? DNS Info: site1.com A site1.com. 00.63.132.34 A mail 00.63.132.34 A ns1 00.63.132.34 A www 00.63.132.34 MX site1.com. mail.site1.com. NS site1.com. ns1.site1.com. NS site1.com. ns2.site1.com. TXT site1.com. v=spf1 a mx ptr -all DNS Info: site2.com A site2.com. 00.63.132.35 A mail 00.63.132.35 A ns1 00.63.132.35 A www 00.63.132.35 MX site2.com. mail.site2.com. NS site2.com. ns1.site2.com. NS site2.com. ns2.site2.com. TXT site2.com. v=spf1 a mx ptr -all
No router installed. What is really odd is that when use a mail client to send and receive through port 2525 seems to be working fine. However, all emails that are sent out are addressed with the server name "[email protected]" and also "[email protected]". When sending an email from the system, localhost, using Java Mail and using SMTP setting mail.example.com through port 2525 all emails are marked as "Relay Access Denied". Do you think this has anything to do with my DNS settings? DNS Info: site1.com A site1.com. 00.63.132.34 A mail 00.63.132.34 A ns1 00.63.132.34 A www 00.63.132.34 MX site1.com. mail.site1.com. NS site1.com. ns1.site1.com. NS site1.com. ns2.site1.com. TXT site1.com. v=spf1 a mx ptr -all DNS Info: site2.com A site2.com. 00.63.132.35 A mail 00.63.132.35 A ns1 00.63.132.35 A www 00.63.132.35 MX site2.com. mail.site2.com. NS site2.com. ns1.site2.com. NS site2.com. ns2.site2.com. TXT site2.com. v=spf1 a mx ptr -all
Please use localhost instead of mail.example.com - that way you don't have to authenticate. Do you really use IPs starting with 00, or do you just use this here in the forum to hide your real IP?
Falko I am using localhost for the time being and yes I am hiding the IP addresses in this posting thus they begin with 00. I'm surprised that no one else had the same issue as I used the tutorial 3 times and got the same result. Regarding the below two items where would you being your troubleshooting? What is really odd is that when use a mail client to send and receive through port 2525 seems to be working fine. However, all emails that are sent out are addressed with the server name "[email protected]" and also "[email protected]". When sending an email from the system, localhost, using Java Mail and using SMTP setting mail.example.com through port 2525 all emails are marked as "Relay Access Denied".
Please make sure you set the correct sender address in your email client. Can you post an excerpt from your mail log?
