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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