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Postfix takes 25 port instead of 587
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 0%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ET%3C/text%3E%3C/svg%3E)
Thrilokesh
35
Reputation points
i have configurted the postfix to use 587 submission port instead of 35 . but still it takes 25 while send a mail
i havementioned main and master configuration files for refreance
Mail log
connect to alt1.gmail-smtp-in.l.google.com[142.250.141.27]:25: Connection timed out
May 29 07:05:56 mail postfix/smtp[97337]: connect to alt1.gmail-smtp-in.l.google.com[142.250.141.27]:25: Connection timed out
May 29 07:05:56 mail postfix/smtp[97339]: connect to alt1.gmail-smtp-in.l.google.com[142.250.141.27]:25: Connection timed out
May 29 07:05:56 mail postfix/smtp[97339]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4023:c0b::1b]:25: Network is unreachable
May 29 07:06:26 mail postfix/smtp[97337]: connect to alt2.gmail-smtp-in.l.google.com[142.250.115.26]:25: Connection timed out
May 29 07:06:26 mail postfix/smtp[97338]: connect to alt2.gmail-smtp-in.l.google.com[142.250.115.26]:25: Connection timed out
----------------------------------main.cf--------------------------------------------
smtpd_use_tls = yes
smtp_tls_CApath=/etc/ssl/certs
smtp_tls_security_level=may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_tls_wrappermode = yes
smtpd_tls_auth_only = yes
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
virtual_transport = lmtp:unix:private/dovecot-lmtp
virtual_mailbox_domains = /etc/postfix/virtual_mailbox_domains
myhostname = mail.jespersoft.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = $myhostname, mail.jespersoft.com, localhost.jespersoft.com, , localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
masquerade_domains = jespersoft.com
----------------------------------main.cf--------------------------------------------
----------------------------- master.cf ----------------------------------------------------
# (yes) (yes) (no) (never) (100)
# ==========================================================================
smtp inet n - n - - smtpd
#smtp inet n - y - 1 postscreen
#smtpd pass - - y - - smtpd
#dnsblog unix - - y - 0 dnsblog
#tlsproxy unix - - y - 0 tlsproxy
submission inet n - y - - smtpd
-o syslog_name=postfix/submission
# -o smtpd_tls_security_level=encrypt
-o smtpd_sasl_auth_enable=yes
# -o smtpd_tls_auth_only=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$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
#smtps inet n - y - - smtpd
----------------------------------master.cf--------------------------------------------
{count} votes
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VasimTamboli 4,410 Reputation points2023-05-29T07:28:36.9233333+00:00 Based on the configuration files you provided, it appears that you have enabled the submission service in Postfix to listen on port 587. However, the log entries you shared indicate that Postfix is still attempting to connect to Gmail's SMTP server on port 25. This suggests that there might be an issue with the configuration or that the changes have not been applied.
To troubleshoot the problem, you can follow these steps:
Double-check the main.cf file and ensure that you have correctly modified the configuration for the submission service. Look for any instances where port 25 might be explicitly mentioned and replace them with port 587.
Verify that you have restarted or reloaded the Postfix service after making the changes to the configuration files. Changes to the configuration will not take effect until the service is restarted or reloaded.
Check if there are any other configuration files or services that could be overriding the changes you made. Review other configuration files related to Postfix, such as master.cf or any additional included files.
Verify that there are no firewalls or network restrictions blocking outgoing connections on port 587. The "Connection timed out" error in the log suggests that the server is unable to establish a connection. Ensure that the necessary ports are open for outgoing connections.
Check if there are any other processes or services using port 587 on the server. You can use the
netstatcommand to identify any conflicting processes.Review the Postfix documentation and official guides to ensure that you have correctly configured the submission service.
By following these steps and ensuring that the changes are correctly applied and there are no conflicting configurations or network restrictions, you should be able to resolve the issue and make Postfix use port 587 for email submission.
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Thrilokesh 35 Reputation points
2023-05-29T10:07:48.5466667+00:00 Hi
- I have check there is no additional the configuration files .
- the ports are open checked with netstat
is there any article available for the port change
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