Start by logging into your gmail account and choose the gear -> Settings in the upper right corner of your screen: Then you choose Accounts -> Send mail as -> Add another email address you own That will make this window pop up: Type in your email address (e.g. firstname.lastname@example.org), click Next Step and then Next Step again, and then Send Verification. You will now receive an email from Gmail Team with a confirmation link. Click it. Voila, you can now compose a new email, and then click your name/email address to choose which mail address you are sending from. You can also create filters and a signature for your @multibam.com address.