SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): SSL operation failed (PHPMailer/Drupal)

Problem:

SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failedSMTP server error: QUIT command failed Detail ...

 

Solution:

sudo apt-get install --reinstall ca-certificates
sudo dpkg-reconfigure ca-certificates
sudo update-ca-certificates --fresh

+ Restart :

  • Dovecot IMAP- und POP3-Server
  • PHP-FPM 8.*
  • Postfix
  • SMTP-Server (Postfix)
  • Webserver (Apache/nginx)

 

 

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