More and more internet access providers are closing port 25 to reduce spam except for connections to their own mailservers. If you run your own mailserver and have problems to connect to it on port 25, you can enable port 465 (smtps) in postfix as a workaround. Edit the /etc/postfix/master.cf file:
vi /etc/postfix/master.cf
and remove the # in front of the smtps line. Example for Debain 5, change the line:
#smtps inet n - - - - smtpd
to:
smtps inet n - - - - smtpd
and restart postfix:
/etc/init.d/postfix restart
How to enable port 465 (smtps) in postfix mailserver
Postfix documentation directs use of ‘postfix reload’ to re-read configuration files including master.cf.
The following is an excerpt from the description of the stop command in the postfix man page.
“Note: in order to refresh the Postfix mail system after a configuration change, do not use the start and stop commands in succession. Use the reload command instead.”
for SUSE 11.1 does not fix it, and SMTP stops
Sorry, but after the release line “SMTPS …….” started soon and will SMTP or SMTPS not starts
@monkey
For openSUSE you need to change the smtps become 465, it will look like
465 inet n – n – – smtpd
I use it and it runs flawlessly
Regarding medwinz comment on OpenSuSE. This could also be corrected by adding smtps as a proper service in /etc/services.
The reason for this discrepancy is that formally the smtps does not have an officially recognized port by IANA. Port 465 is (surprisingly) only officially a port for IGMPv3 which is a daemon used in conjunction with multicast services. Since it is very rare to run multicast on the same server as a mail server it is usually safe to allocate 465 for smtps.
Bei der Anleitung fehlt etwas:
die Zeilen unter
smtps inet n – – – – smtpd
also
-o smtpd_tls_wrappermode=yes
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
müssen ebenfalls vom * befreit werden.
thanks Till, you have most helpful with this little tutorial… We just had to open port 465 in ISPConfig and it worked fine.
work perfectly either on BSD and Centos OS, anyway is possible to also open port 587 ?
Thanks issue resolved ,
I have added below 2 lines in master.cf file .
smtp inet n – n – – smtpd
smtps inet n – n – – smtpd
now both ports are working fine without SSL .
25 and 465
Thanks,
Ramu
Thanks, this worked for me 🙂