One of our users received the following response to an email he sent:
The following addresses had permanent fatal errors ----- <firstname.lastname@example.org>
(reason: 550 Relaying mail to rccf.com is not allowed. If you are using an e-mail client (e.g., Outlook Expr...
----- Transcript of session follows ----- ... while talking to mx1.fuse.net.:
<<< 550 Relaying mail to rccf.com is not allowed. If you are using an e-mail client (e.g., Outlook Express, Netscape Messenger, etc.) to send or receive e-mail from your current location, you may need to change the Incoming and Outgoing server settings on your e-mail client. Your local Network Administrator can provide the proper server settings for your e-mail client. For more information, please visit http://www.cincinnatibell.com/residential/internet/fuse/support/security/openrelay.asp
550 5.1.1 <email@example.com>... User unknown <<< 503 No recipients specified
The user has successfully sent emails to this address before. What is the cause of this and what can be done to fix? Please be specific and descriptive with your answers. Thanks for your time.