1. Once you've logged in, scroll down on the left dock and click "Add account". See Figure 1

 Figure 1

 2. Scroll downwards and click on "Generic IMAP or POP (Manual)".See Figure 2

Figure 2

3. Enter the email address and password of the account you want to add.See Figure 3

Figure 3

4. Enter the Incoming and Outgoing Settings. Inky will try to figure out the rest automatically. Click "Add Account".See Figure 4

Figure 4