Why send exchange mail message activity gives The remote server returned an error: (403) Forbidden?

I am using send mail message activity, but from last few days it’s not working and gives an error :
Send Exchange Mail Message: The request failed. The remote server returned an error: (403) Forbidden.

What is the cause of this error? How can we solve it?

Image may be NSFW.
Clik here to view.

MailError819×460 17.5 KB

18 posts - 6 participants

Read full topic