Setting Up EMail Channel Zoho Desk

Setting Up EMail Channel Zoho Desk

Hello, 

I am currently in the process of setting up Zoho Desk to be our ticketing system. Having followed the instructions here: 
https://help.zoho.com/portal/en/kb/desk/for-administrators/multi-channel-support/email/articles/setting-up-your-email-channel#Default_Support_Mailbox

I am unable to set up a default e-mail address as the screenshot in the instructions is completely different than the options available to me. 

Here is a screenshot from the instructions: 


And here is what I ACTUALLY have:


Any help in this area would be greatly appreciated.