Hi Affan,
I would suggest most of the time to have SAP EM as a separate system (if server affordable by client) instead of adding as an addon.
You should be followed by Steffen then only you can send an email.
To send an email, go top right and you can see Actions.
Click and you can see "Send Direct Message". Click and enter Steffen full name and see whether you able to send a direct message.
Regards
GGOPII