Use below configuration to test whether the SBO Mailer is working. 


SBO SERVER TOOLS : Job Service - Mailer Setup

Server : mail.smtp2go.com

Port : 2525
User ID : [enter email]
Password : [enter password]


Optional: 

  Sender email : SAP MAILER TEST

  Sender email : [enter email]


You could login to SMTP Admin Page to check the sent emails status:

URL : https://app.smtp2go.com/login/ 

User ID : [enter email]
Password : [enter password]


SMTP2GO

Dashboard - Monitor Emails Sent by Day


Emails Details Report - Review last email sent successfully