Symfony is throwing error when I try to send email. Apparently there is ssl certificate verification failure. The project is running on linux nginx server.

The .env file has following configuration.

MAILER_URL=smtp://user:[email protected]??encryption=ssl&auth_mode=login

Error log

app.ERROR: Could not send mail: Failed sending mail to following recipients: {{ recipients }} with Error: Connection could not be established with host "ssl://mail.ourserver.de :465": stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed Error Code:0

Do I need to get ssl certificate for the domain in this case "mail.ourserver.de" and add cert and key in linux openssl configuration?

A hack to make it work! I have found it in stackoverflow answers, but not sure if it's a good practice and does that make the ssl connection vulnerable to attack? verify_peer=false parameter

MAILER_URL=smtp://user:[email protected]??encryption=ssl&auth_mode=login&verify_peer=false

If i disable verify_peer option, it does work, but Is ssl verification taking place when peer verification is set to false or it's being completely disabled?

CodePudding user response：

It's failing to verify your server's certificate. There's a guide for checking and updating certificates here. (it's for PHPMailer but the parts regarding certificates are still relevant)

CodePudding user response：

If you did not add a SSL certificate yourself, but use SSL, you probably have an autogenerated, self signed certificate in place.

Yes, you should assign a domain name to the server and get some valid, trusted SSL certificate for it. You can use the free LetsEncrypt service. The details depend on the mail server software.