550 please turn on smtp authentication in your mail client. cpanel

A CPanel error!

The error message "550 please turn on smtp authentication in your mail client" is an SMTP error that indicates that the mail server is configured to require authentication (username and password) to send emails, but the mail client (e.g. email client software or webmail) is not configured to provide this authentication.

Here are the steps to resolve this issue:

For Webmail (e.g. Roundcube, Horde):

  1. Log in to your webmail account.
  2. Click on the "Settings" or "Preferences" icon (usually represented by a gear or cog icon).
  3. Look for the "SMTP" or "Outgoing Mail" settings.
  4. Check the box next to "Use SMTP Authentication" or "Use Authentication".
  5. Enter your email address and password in the corresponding fields.
  6. Save your changes.

For Email Client Software (e.g. Microsoft Outlook, Mozilla Thunderbird):

  1. Open your email client software.
  2. Go to the "Account Settings" or "Preferences" menu.
  3. Look for the "SMTP" or "Outgoing Mail" settings.
  4. Check the box next to "Use Authentication" or "Use SMTP Authentication".
  5. Enter your email address and password in the corresponding fields.
  6. Save your changes.

For Mobile Devices (e.g. iPhone, Android):

  1. Open your email app (e.g. Mail, Gmail).
  2. Go to the "Settings" or "Accounts" menu.
  3. Look for the "SMTP" or "Outgoing Mail" settings.
  4. Check the box next to "Use Authentication" or "Use SMTP Authentication".
  5. Enter your email address and password in the corresponding fields.
  6. Save your changes.

After making these changes, try sending an email again to see if the issue is resolved. If you're still experiencing issues, you may want to contact your email provider or CPanel administrator for further assistance.