Postfix don't send with port 25 anymore

[travelbaba]

Good day everybody.
Yesterday suddenly my server running plesk 12.0.18 on Centos stopped to send emails with port 25.
But port 587 with TLS is working.
Also webmail doesn't send emails.

Email client deliver following error: 5.7.0 Must issue a STARTTLS command first

No update made, nothing changed, just from one day to another!
I've switch to Qmail and it's working, but I don't feel safe with qmail.

Anyone have this problem?

I was reading about changing following rules:

submission inet n - n - - smtpd -o smtpd_enforce_tls=yes -o smtpd_tls_security_level=encrypt -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination

But if I change smtpd_tls_security_level=encrypt
to may
postfix doesn't start anymore....



Thanks!

 

[Lloyd_mcse]

Hi,
the "submission" part is control for port 587 which works as expected, and is set up correctly.

As for Port 25, have a look in the /etc/postfix/main.cf and see what you have set for...

smtp_tls_security_level = may
smtpd_tls_security_level = may

And see what you have for...

smtp_use_tls = no
smtpd_use_tls = yes

Regards

Lloyd

 

[Dave W]

Check the settings Lloyd suggested above, also show us the output of:

ss -lnp|grep :25

Also check firewall settings?