I use Eudora to manage my email. Today, Eudora can receive email sent to{edited for privacy}, but cannot send email from {edited for privacy}. The error message is:
"error transferring your mail. I Said: MAIL FROM:<{edited for privacy}> and then the SMTP server (outgoing.verizon.net) said: 550 5.7.1 Authentication Required"
What is happening, and how do I deal with it??
Many thanks for your help.