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SMTPTLS port 587 Close after fresh Install
[Not Solved] RE: SMTPTLS port 587 Close after fresh Install
I think there is a problem with the SSL certificates generated by the SSL module. In my case, to fix the situation, I needed to change the following:

For Postfix:

Quote:Edit and


Quote:smtp_use_tls = yes
smtpd_use_tls = yes
smtp_tls_note_starttls_offer = yes

smtpd_tls_security_level = may
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
smtp_tls_session_cache_database = btree:$data_directory/smtp_tls_session_cache

smtpd_tls_cert_file = /etc/letsencrypt/live/
smtpd_tls_key_file = /etc/letsencrypt/live/

The SSL certificates created inside


Not work with Postfix. I needed to install `certbot` on Ubuntu to create and regenerate SSL certificates in the specified path, adding " (your domain" and "".

Note that Apache needs to be stopped during the installation.

To fix port 587, add these two lines inside `` if you want to use both ports simultaneously, or select the port you want:

Quote:smtp inet n - n - - smtpd
587 inet n - y - - smtpd

Also, you need to configure Dovecot with the same paths as in Postfix, need edit dovecot2.conf :

Quote:ssl = yes
ssl_cert = </etc/letsencrypt/live/
ssl_key = </etc/letsencrypt/live/

When I ran the test on, everything worked 100%.

I don’t know if this is the best approach for Sentora, but support told me it is the best way to fix this issue. At the moment, I haven't found another solution, and this works perfectly. Ideally, everything should be activated automatically from Sentora, in my opinion.

Additionally, I have noticed that sometimes the SSL module fails to renew certificates, and other times it doesn’t. I think it is necessary to address these issues.

Thanks given by:

Messages In This Thread
RE: SMTPTLS port 587 Close after fresh Install - by franmm25 - 06-10-2024, 02:05 AM

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