cannot send emails
Cannot send emails.
Following message appears:
Send Message Error Sending of the message failed. An error occurred while sending mail. The mail server responded: Authentication is required for relay. Please check the message recipient [email protected] and try again.
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I am using version 128.5.2esr (64-bit)
You need to go into account settings. Locate the menu entry of outgoing servers (SMTP) fine the one that you are using in the list and change the authentication to normal password. It is very unusual for any provider to allow you to send mail unauthenticated. That would mean they had an open relay and would be blacklisted for spam in minutes.