I installed Alert Central behind a firewall from my email server (Outlook) and unable to complete the configuration. Do you happen to know what ports will need to be opened for communicating between this Alert Central server and the email server?
Basically all of my supported servers including my SolarWinds Orion servers are on the other side of a firewall where my email (Outlook) server is located.
Alert central can use POP3 or IMAP to retrieve mail and it uses SMTP to send. Ask your mail server admin if the ports are non-default. Otherwise, you can see what the default ports are for the selected protocol in the advanced section of the email configuration in Alert Central.