EmailDiscussions.com - View Single Post - 550 - Please turn on SMTP Authentication in your mail client

aussieboykie · 21 Jul 2019, 01:32 PM

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.

<info@bushbabyglen.com>: host mail.bushbabyglen.com[66.147.244.59] said:
550-Please turn on SMTP Authentication in your mail client.
550-wout5-smtp.messagingengine.com [64.147.123.21]: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?

21 Jul 2019, 01:32 PM	#1
aussieboykie Essential Contributor Join Date: Dec 2002 Location: Sydney, Australia Posts: 475	550 - Please turn on SMTP Authentication in your mail client 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. <info@bushbabyglen.com>: host mail.bushbabyglen.com[66.147.244.59] said: 550-Please turn on SMTP Authentication in your mail client. 550-wout5-smtp.messagingengine.com [64.147.123.21]: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?