I seem to get the pop3 to work but not the smtp
The below are SMTP settings that you can use in eM Client depending on what your mail server supports.
See @Gary post below from the following thread.
https://forum.emclient.com/t/unable-to-send-or-receive-emails-since-latest-update/90222/9
The port and security policy combinations are very specific:
POP3
Port 995 = Use SSL/TLS on special port (legacy)
Port 110 = Use SSL/TLS if available
SMTP
Port 587 = Force usage of SSL/TLS
Port 465 = Use SSL/TLS on special port (legacy)
Port 25 = Use SSL/TLS if available
Also see this thread post below by @GBS where he advised Optusnet now requires users to be authenticated to be able to send email.
https://forum.emclient.com/t/optusnet-in-australia-authenticated-email-required/96881