Thread: 550 - Please turn on SMTP Authentication in your mail client
View Single Post
Old 22 Jul 2019, 11:44 AM   #13
aussieboykie
Essential Contributor
 
Join Date: Dec 2002
Location: Sydney, Australia
Posts: 475
I just tried sending to the target address from the FastMail web interface and got the same error so it's apparently not a Thunderbird issue.
aussieboykie is offline   Reply With Quote