Merchello Notification throwing this error: No connection could be made because the target machine actively refused it

Question

I've been getting this exception when Merchello tries to send an email notification:

No connection could be made because the target machine actively refused it

I am using send grid and I've tried the exact same credentials that I was using on Local and it works fine locally.

I'm sure it's something to do with the server, what I've tried so far:

• Made sure SMTP service is running on the server
• Opened the port 587 in the firewall
• Temporally disabled the firewall
• Tried a different SMTP provider

• Added this to the web config:

   <system.net>
     <defaultProxy> 
       <proxy usesystemdefault="False"/> 
     </defaultProxy>
    </system.net>
  

More form the stack trace:

 System.Net.WebException: Unable to connect to the remote server ---> 
 System.Net.Sockets.SocketException: No connection could be made because the 
 target machine actively refused it

Any ideas? Thanks

Answer 1

I changed the port to 25 and it worked, not sure why I was asked to use 587.