There is no outbound smtp or inbound pop3 setting in the latest version of ServiceNow that I just setup. Apologies if I sent to wrong forum. I did not see one for general issues.
If you are talking about the PDI, then I think it's the expected behaviour.
OOB email sending and receiving feature was deactivated. So you need to set up your own smtp and pop3 servers to send or receive email from/to ServiceNow.
Refer the below community post to setup the custom configuration.
