Changing your outgoing address

log into your account

click the gear

select settings

click accounts

click "Add another email address you own"

enter your seas, eecs, or cs email address.

you will get an email at the address you entered to verify you own this address.

follow the instructions in the email to verify your address.

on the accounts page select "make default" next to your harvard email address if you want all email you send to default to using this address.