When sending mail, Eudora displays an error "503 Need Recipient" Solution: You have a message queued to be sent in your Out box that has one of these problems: 1. The To: field and the Bcc: field are blank. One or the other of these headers must contain an address or a valid nickname. 2. A message has a Nickname (address book entry) in the To: line that doesn't point to an address. For example, the To: line might be "Mickey" (no quotes), and the Nickname window would have a Nickname entry for "Mickey" but there wouldn't be an address associated with that Nickname. 3. Check your address book to make sure that the Nicknames have addresses in the address fields. Also, make sure that no e-mail addresses appear in the nickname field itself. E-mail addresses should only appear in the addresses field. If you have a lot of queued messages, you might want to transfer all the queued messages to a temporary mailbox to clear out the queue. You can go to these messages in their new mailbox and use the Message: Send Again to send them one at a time until you come accross the message with the problem.