SMTP error 10060 signifies that your email server failed to establish a connection with the recipient's server within the designated timeframe (phpmailer, jenkins). This indicates a communication breakdown during the email sending process.

What Triggers This Error?

Several factors can contribute to this error:

• Incorrect Server Details: Invalid SMTP host address, port number, or authentication credentials (phpmailer, jenkins).
• Network Connectivity Issues: Network problems on the sending server preventing it from reaching the recipient's server.
• Firewall Blocking: Firewalls or security measures on either server might be blocking communication.

Resolving SMTP Connect Error 10060

Here's how to troubleshoot and fix this error:

1. Verify Server Configuration: Double-check the SMTP host address, port number, and authentication details (username and password) for accuracy (phpmailer, jenkins).
2. Test Network Connectivity: Use tools like ping or telnet to verify network connectivity between the sending server and the recipient's server.
3. Review Firewall Settings: Ensure firewalls on both servers allow communication on the required ports used for SMTP (typically port 25 or 587).
4. Check Authentication: If using SMTP authentication, confirm the credentials are valid and have the necessary permissions.

By addressing these potential causes, you can establish a successful connection between the servers and ensure smooth email delivery.

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