Failed to read SMTP TLS certificate

[mdobydullah]

Hi, I set up Postal with docker (followed: https://docs.postalserver.io/) and added cert files to the postal.yml file.

smtp_server:
  tls_enabled: true
  tls_certificate_path: /opt/postal/config/smtp.crt
  tls_private_key_path: /opt/postal/config/smtp.key

Tested with: https://www.gmass.co/smtp-test

Results:

<< 250-My capabilities are
<< 250-STARTTLS
<< 250 AUTH CRAM-MD5 PLAIN LOGIN
>> STARTTLS
<< 220 Ready to start TLS
ERROR: An error occurred while attempting to establish an SSL or TLS connection.

Then I checked Postal SMTP log:

How can I solve this?

[willpower232]

I think you should use postal bash smtp to connect to the smtp container and then verify that the certificate files are present and readable

[mdobydullah]

I already read the whole docs a few times. 😅

Anyway, thanks man!

[XenyFord]

Its always worth using postal bash to verify that any files have made their way into the docker container. You can also verify the permissions on the file that way.

Hi Mr. Will,

I tried both the ways with /config/smtp.crt and /opt/postal/config/smtp.crt but, still, I'm getting the same error "smtp_1 | [10] [2021-09-01T18:57:48.551] ERROR -- : [UDBNBP] Errno::ENOENT: No such file or directory @ rb_sysopen - /config/smtp.crt"

Could you please help me solve this? Thank you in advance!

[willpower232]

@XenyFord can you stop commenting with the same question in random places? its very hard to see where you have actually received help

[XenyFord]

Mr. Will,
Okay. Absolutely, I will not do that. Sorry for bothering you!

[willpower232]

I can't find where you first asked about this but I think you want to try #1570 (reply in thread)

[adamcooke]

When you're reference files in /opt/postal/config in the postal.yml, you need to remember that the containers that are running Postal don't have access to operating system's file system. The /opt/postal/config directory is mounted at /config.

Assuming the files are in /opt/postal/config on the host, you can just do this.

smtp_server:
  port: 25
  tls_enabled: true
  tls_certificate_path: /config/smtp.crt
  tls_private_key_path: /config/smtp.key

[mdobydullah]

Thank you so much, @adamcooke.

@willpower232 helped me to fix the issue.

[XenyFord]

Thank you so much, @adamcooke.

@willpower232 helped me to fix the issue.

Hello Mr. Obydullah,

Did you find the solution for sending emails through the secured connection via TLS/SSL ?
I'm still getting the same error "smtp_1 | [10] [2021-09-01T18:57:48.551] ERROR -- : [UDBNBP] Errno::ENOENT: No such file or directory @ rb_sysopen - /config/smtp.crt"

Could you please help me solve this? Thank you in advance!

[hswamy]

@XenyFord Please check the permission for smtp.crt, ( Give read access )

[XenyFord]

Hi Sir,
I'm not able to find such file named "smtp.crt". Could you please let me know how to find and apply the same in right way?
Thank you in advance for your help.