Hello Team,
I believe you all are doing good and keeping safe.
I'm using an RPA tool to send emails to business. Sending email to business via tool is happening for more than 6 months. But all of sudden it has stopped working. We investigated the issue & found access is getting blocked by the global windows defender firewall policy.
This policy is applied through GPO to block all Outbound SMTP( Port:25) access from workstations. So the problem is that the application connect to the Global SMTP Relays on Port 25 that means that we need to be able to connect to the Global SMTP Relays on Port 25 and this connection is what Defender is NOT allowing We can't change the SMTP port of the Global SMTP Relays because we have 1000s of applications connecting to us.
Isn't there any way to limit it to only some workstations that are identified so it is not enabled for all?