How do I send from a custom email address?
To maximize deliverability of the emails we send (meaning the emails we send for you make it to inboxes, and not spam or junk folders), we have to keep tight control of the domains we send from. If you want to send from a custom email address, say firstname.lastname@example.org, instead of email@example.com, it's a pretty easy process!
All you need to do is get in contact with someone on our support team. You can do so via the blue message icon at the bottom right of all pages in your account. We'll have you set up a few DNS records on your domain so we can prove to email services like Gmail and Outlook that we have control of the domain we are sending from. The details are called out here.
When that process has been completed, you'll be able to send from any email address that is part of the domain we verified.