We use GoDaddy as our email provider. In FMC, under Configuration...Mail, I am using smtpout.secureserver.net as the SMTP Server, port 3535 (although I have also tried ports 25 and 80), not using SSL, and I have entered the correct credentials. The e-mail address and password are correct at GoDaddy - I can set them up and use them in my email client, and I can send and receive just fine.
Unfortunately, I get this error every time I submit an agent: Trying SMTP Delivery loop again ... [nWSError: 75005] Failed to send AUTH command. Authentication failed for ... and so forth.
We are on OBIEE 126.96.36.199.0 (20160923.092103) running on Windows Server 2012.
I have restarted all BI Services in FMC, and restarted the bi_server1 in WLS. No love.
Oops. Nevermind. Although I started to just delete the post, I figured I might as well contribute the solution. Make sure there isn't an extra blank space in front of the email address in the FMC configuration.