Explained: SMTP by Zapier error "Authentication failed: Connection unexpectedly closed: timed out"

In this blog post, we will demystify this common SMTPrelated error and provide you with practical solutions to get you back on track.

Understanding the-error:

The error message "Authentication failed: Connection unexpectedly closed: timed out" is an SMTP (Simple Mail Transfer Protocol) related issue that occurs when the server takes too long to respond to a request from Zapier. SMTP is the most widely used email communication protocol over the internet, which is responsible for sending and receiving emails. This error indicates that Zapier attempted to establish a connection with your SMTP server but was unable to do so within the allotted time frame. As a result, the connection is closed, and the "timed out" error is generated.

There are several reasons why this error could occur, including incorrect SMTP settings on Zapier, issues with your SMTP server, or even network problems. In the next few sections, we will explore these issues and provide solutions that you can apply to troubleshoot and resolve this troublesome error.

Incorrect SMTP Settings in Zapier:

One of the most common reasons for encountering this error is misconfigured SMTP settings on your Zapier account. To ensure your email sending process is working correctly, it's essential to enter accurate SMTP credentials and settings within Zapier. Double-check your SMTP host, port number, username, and password. Make sure they match the details provided by your email service provider.

If you are using a secure connection, such as SSL or TLS, ensure that the correct port is entered (typically 465 for SSL and 587 for TLS). If your email provider requires authentication, make sure that the "use authentication" option is enabled and the correct username and password are entered. Additionally, keep an eye out for any typos or seemingly insignificant details that could be causing the error.

SMTP Server Issues:

Another possible reason for this error is an issue with your SMTP server. It could be a temporary connection problem or even an unresponsive server. Server-side issues can be challenging to troubleshoot, but some steps can be taken to help identify and resolve the problem. First, try accessing your webmail or sending a test email directly from your email client to ensure your email service is working correctly.

If you notice any issues with your email provider, contact your provider's support team or consult their help documentation for additional guidance. In some cases, email service providers might be blocking connections from third-party apps, such as Zapier, for security reasons. Reach out to your provider and inquire about any limitations or restrictions that might be affecting the connection.