Fix SMTP Error (535): Authentication Failed – Troubleshooting Guide
SMTP Error (535): Authentication Failed
Are you encountering the SMTP Error (535) when trying to send emails? This error, which states "Server says: 535 – Incorrect authentication data," typically results from incorrect SMTP user authentication details.
Understanding SMTP and Error 535
SMTP (Simple Mail Transfer Protocol) is a protocol used by mail servers to send or relay outgoing mail between senders and receivers. The 535 error often indicates a problem with SMTP authentication. Common causes include:
- Incorrect username or password
- Disabled SMTP service on your hosting account
- Hosting plan limitations
How to Check SMTP Status on Your Account
If you are experiencing this error with our mail services, it may be due to a disabled SMTP service. You can confirm this by logging into your Hosting Control Panel and checking the Account Usage section. Look for an SMTP OFF notice to verify the status.
Note: Some hosting plans do not include SMTP services. If your plan lacks SMTP support, consider upgrading to a plan that includes SMTP.
Steps to Enable SMTP or Resolve 535 Error
If your plan includes SMTP, and you have used it before, the service may have been temporarily disabled. Please check your support tickets for additional details.
In case your hosting plan does not offer SMTP and upgrading is not an option, explore other options such as a third-party email provider to manage outgoing emails.
Contact Support for HelpTags: 535 authentication failed, email error, email troubleshooting, Outlook SMTP error, Roundcube error, SMTP authentication, SMTP error, SMTP settings