550 pleaseturn on smtp authentication in your mail client

A very specific error message!

The error message "550 Please turn on SMTP authentication in your mail client" typically means that the mail server you're trying to send an email to is configured to require SMTP authentication, but your email client is not sending the authentication credentials.

Here are some steps to help you resolve this issue:

  1. Check your email client settings: Make sure that your email client is configured to use SMTP authentication. The settings may vary depending on the email client you're using. Here are some general steps:
    • In Outlook, go to File > Account Settings > Manage Profiles > Properties > Advanced > Outgoing Server > My Outgoing Server (SMTP) > Require Logon using Secure Password Authentication (SPA).
    • In Gmail, go to Settings > Accounts and Import > Other > Manual setup or additional server types > SMTP > Authentication > Use Advanced settings > Require login using Secure Password Authentication (SPA).
  2. Enable SMTP authentication in your email client: If your email client doesn't have an option to enable SMTP authentication, you may need to use a third-party add-on or plugin to enable it.
  3. Check your username and password: Make sure that your username and password are correct and match the credentials you use to log in to your email account.
  4. Check your mail server settings: Verify that your mail server settings are correct, including the SMTP server address, port number, and authentication method.
  5. Try using a different email client or account: If you're still having trouble, try using a different email client or account to see if the issue persists.

Some common causes of this error include:

If you're still having trouble, feel free to provide more details about your email client and settings, and I'll do my best to help you troubleshoot the issue!