Problems Postfix

Hello,

I am using the WHMCS panel and when I send an email from WHMCS I have an error:

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:

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

resolved problems

resolved problems

How did You resolve it ?

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.

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.

Works!!!

Thanks for the solution!

Just dropping by to say thank you. Thanks !
I was having difficulties connecting Outlook to my vps due to a certificate error. Then with a lot of struggle I found out that with imap ia, but I wasn't satisfied and wanted to make it top even with pop3 over SSL, and with this tutorial here it worked. Thanks for posting.