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Old 14 Aug 2019, 03:16 PM   #21
Junior Member
Join Date: Aug 2019
Posts: 1
Originally Posted by aussieboykie View Post
I sent an email from Thunderbird and got an undeliverable reply as follows. SMTP on Thunderbird is set to use port 465, SSL/TLS, my regular FastMail identity, and my Thunderbird application password. Authentication method is set to Normal password.

<[email protected]>: host[] said:
550-Please turn on SMTP Authentication in your mail client. Update gun mayhem 2. []:51893 is not permitted
to 550 relay through this server without authentication. (in reply to RCPT
TO command)

What do I need to do to fix this?
I think you try a different security setting with port 587 starlets or what ever it called sorry cant remember.
sharpmine is offline   Reply With Quote