Why 535 Authentication Failed On Zoho?

The error code 535 is an authentication error that occurs when you are configuring your Zoho Mail in Gmail or any other email clients. To fix the 535 authentication failed on Zoho error, you have to enter the application-specific password (for Two Factor Authentication) instead of your email account password.

Steps To Resolve

Step 1: On your computer, launch the default browser and navigate to the official Zoho Mail Sign-In page.

Step 2: Log in to your Zoho Mail account with your login credentials.

Step 3: Click the Two Factor Authentication tab at the top-right corner and switch the slider to Enabled.

Step 4: Enable POP access on your Zoho Mail account from the Mail Accounts section.

Step 5: To generate the application-specific password, click the My Account link at the top of the page and select Security from the left-side panel.

Step 5: Select the App Passwords sub-menu and click the Generate New Password button under the Application Specific Passwords section.

Step 6: If necessary, enter the app name for reference and click the Generate button.

Step 7: Note down the application-specific password and open a new browser tab.

Step 8: Open the Gmail Sign-In page and log in to your Gmail account.

Step 9: Click the Settings icon at the top of the page.

Step 10: Select Settings  Accounts and Import  Add a POP3 mail account you own.

Step 11: Enter your Zoho Mail email address and click the Next Step button.

Step 12: Input your email address with the domain name and enter your app-specific password in the Password field.

Step 13: Input the Incoming mail server name, POP port, Outgoing mail server name, and SMTP port.

Step 14: Input the Zoho Mail email address in the Username field and enter the application-specific password in the Password field.

Step 15: Fill in the POP Server and Port fields. Select the required checkboxes.

Step 16: After ensuring that you have selected the necessary settings, click the Add Account button.

Step 17: Once your email account is added, select Yes and click the Next Step button.

Step 18: Now, Gmail will send a code for confirmation to your Zoho Mail email address.

Step 19: Open the Gmail email message on your Zoho Mail and note down the verification code.

Step 20: Return to your Gmail account and enter the verification code in the Gmail confirmation window.

Step 21: Click Verify to complete the email account setup.

Step 22: Try sending a test email from the Zoho Mail account added in the Gmail suite and check if the 535 authentication failed on Zoho error has been resolved.