Author Topic: Problems Postfix  (Read 807 times)

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Problems Postfix
« on: May 03, 2018, 12:21:11 PM »
Hello,

I am using the WHMCS panel and when I send an email from WHMCS I have an error:
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Failed to send e-mail - Failed to connect SMTP (). https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting (Subject: Confirm your registration)

I try with Thunderbirth to send and receive external emails I receive well

Mailog:
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postfix server / smtps / smtpd [12495]: SSL_accept error of server.mydomain [91.121.183.67]: 0
postfix server / smtps / smtpd [12495]: warning: TLS library problem: 12495: error: 14094418: SSL routines: ssl3_read_bytes: unknown tlsv1 alert ca: s3_pkt.c: 1493: SSL alert number 48:

Thank you for your answers

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Re: Problems Postfix
« Reply #1 on: May 10, 2018, 09:15:32 PM »
resolved problems

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Re: Problems Postfix
« Reply #2 on: May 11, 2018, 06:09:07 AM »
resolved problems

How did You resolve it ?

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Re: Problems Postfix
« Reply #3 on: December 04, 2018, 10:21:45 AM »
Hi,

Basically, the error is saying that the CA is unknown and the connection is dropped. If you will look into your postfix config file /etc/postfix/main.cf, you will notice something like this:

smtpd_tls_key_file = /etc/pki/tls/private/srv.servername.com.key
smtpd_tls_cert_file = /etc/pki/tls/certs/srv.servername.com.crt
smtpd_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt

What you need to do is it so change the CA file path to the correct one. In my case, it was:

smtpd_tls_CAfile = /etc/pki/tls/certs/srv.servername.com.bundle
smtp_tls_CAfile = /etc/pki/tls/certs/srv.servername.com.bundle

This happened when I changed the server hostname and installed a Let's Encrypt SSL for it, from the CWP interface. For some reason, it did not change the CA file path automatically. I hope this will help someone facing the same issues.