Problem sending mails in Ms Outlook

Hi friends. I’m having trouble with Outlook. I am trying to set up bluehost email in outlook. I’m able to receive emails and that function is working properly but unable to send mail. I’m getting this error message “503 valid RCPT command must precede DATA. I have tested the outgoing part individually, but doesn’t show any error. I’m able to send email from another account in outlook properly. Please suggest any solutions. Thank you.
