Error: authentication failed: Connection lost to authentication server

Error: authentication failed: Connection lost to authentication server

  
Hello,
I started to get the following error , when sending emails : Error sending email 1036: 535 5.7.8 Error: authentication failed: Connection lost to authentication server

I've used a simple c# console application and I was able to send emails with the same details...
Hi Nelson,

Did you run the console application from the platform server machine? Was it working before? The error seems to indicate lack of conhectivity between the platform server an the email server.

Cheers,
Guilherme