Big-IQ to send email for alerts and events

Good luck!

Have a look here for all the ports that the BigIQ CM & DCD need; https://support.f5.com/csp/article/K15612#dcd

Most ports required by the BigIQ are for communication between CM and DCD though, so mainly check the "Requirements for DCD" section to see what you need for sending logs etc.

Each module roughly has its own port it listens on for receiving logs, and most of them can have a different IP address, apart from the LTM logging service. It shouldn't be a problem though to set it up in routed mode.