If your email program displays the error message:
503 Valid RCPT command must precede DATA
You have missed a step in setting up your email account.
To fix this your email program must logon to the server before sending emails.
If you are using Outlook follow these steps:
- Open Outlook
- Go to Tools/Email Accounts
- Select the Account and click Change
- Click on More Settings
- Click on Outgoing Server Tab
- Click "Outgoing Mail Server (SMTP) requires authentication" and make sure "Use same settings as incoming mail server" is selected.
You should now be able to sending emails without any errors.