|From: System Administrator
Sent: Monday, June 20, 2005 10:20 AM
Subject: Undeliverable: Email Subject Here
Your message did not reach some or all of the intended recipients.
Subject: Email Subject Here
Sent: 6/20/2005 10:20 AM
The following recipient(s) could not be reached:
'firstname.lastname@example.org' on 6/20/2005 10:20 AM
503 This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server.
If you received bounced back email with subject "Undeliverable:<Email Subject Here>" or similar to above with error code "503This mail server requires authentication when attempting to send to a non-locale-mail address", that means you didn't enable SMTPauthentication on your mailbox.
SMTP Authentication checks to see that you areauthorized to send email before allowing you to relay messages through theserver. This means you MUST configure your email client to authenticate withyour username and password.
- Enable SMTP Authentication. You may refer to the below Tutorials on how toconfigure your email client.
- If SMTP Authentication already enabled but still getting the same error,please double check on your Internet Proxy Settings.