Most contacts and companies have multiple email addresses.

Adding them all would be nice right? Roger That. 😉

Adding a second, third, fourth (and so on) email address

• Go to the contact page

• Press the options button (3 dots, upper right)

• Scroll a bit down to the first email address

• Tab the "+" icon on the right of it.

• Add the email address to add it and press "save"

• Repeat if needed

The inbox on this contact will now show all correspondence to and from the last added email address too.