How to Fix "Invalid Credentials" Error with SMTP Email Server

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If you’re testing your email server and keep getting an “Invalid credentials” error, don’t worry—this is a common issue that can be fixed easily. Here’s a simple step-by-step guide to help you troubleshoot and resolve the problem.

First, double-check your SMTP server settings. You’ll want to confirm that you’re using the correct server address, which in your case is “smtp-mail.bleep“. Make sure the port number is set to 587, which is standard for secure email connections.

Next, verify that the secure connection is enabled. Since you selected “yes” for a secure connection, ensure that your email client or configuration is set to use TLS or SSL on port 587.

A common cause of “Invalid credentials” errors is incorrect login information. Ensure that you’ve entered your username correctly—the full email address associated with your account. If you’re using an app-specific password, make sure it’s correctly entered and that the password is the verified one created specifically for this purpose.

Also, check that your account actually has app passwords enabled if you’re using two-factor authentication. Sometimes, email accounts require you to generate a special app password for use in third-party applications or testing tools.

Finally, confirm that your server is configured for email use and that no other account restrictions are in place. If everything looks correct but you’re still having issues, try resetting your app password or re-creating it, then update your settings accordingly.

By ensuring all these details are accurate, your email server test should go through smoothly. If problems persist, contacting your email provider’s support team can provide additional help.