Good day everyone!

I need advice on the following. Not sure if anybody has ever had this issue. I upgraded SAGE 200c from 5.1a to 5.1a+ and after doing so, changed the ''From Email Address'' on the Payslip PDF Setup and when testing it, it would no longer send the emails. I assumed there may have been an issue with our server which host SAGE but when testing the SMTP settings with Telnet, I was able to send the emails from there. I have also disabled firewall and antivirus on that server but no emails would be sent from SAGE 200c. I contacted support who then ran a few tests (including using gmail and 365), re-installed but it would not work. One of the technical consultants installed SMTP4dev on the server to try and trace where the issue was but there were no logs generated. I also tried DevNullSmtp to check for logs but there was nothing being generated. The SAGE server has been relayed to send emails via our mail server which generates SMTP logs. When sending an email via telnet from the SAGE server, the SMTP logs records the emails sent and delivered. However, when one sends directly from 200c, there are no logs which appear on the SMTP logs in our mail server suggesting the application may not generate emails at all. The technical consultants suggest there could be something blocking the application from sending and I have no idea as to what that could be as this worked fine previously and we have not installed anything in between and the SMTP settings are fine via telnet. Anybody who can please assist with ideas on what could be causing this.