In need of help using the email template module

Hello, I am in need of help using the email module app because everytime I try to test, by sending an email the same error shows up, so I am confused as to why this happens, and want to know whether it is a problem on what I have coded or a problem with the server. Any help to shed some light on this would  be very much appreciated thank you. ​ Here is  screenshot of the error I keep on getting I can provide more information if needed. Thank you very much in advance 
1 answers

Isn't this exactly the same issue as in ?

With regards to the issue, there is already a possible answer in that thread.

Another possible solution is trying to send an e-mail with localhost as server. you can then locally run a tool like this in order to intercept the e-mails: