While it is not required, it is a good idea to save at least one default From line (a.k.a. Sender Address) for your account. The From line should be no more than 200 characters and the correct format is "Company Name"<emailaddress>
- Go to Settings
- Select Account Management
- Click "Sender Addresses"
- Click the "Create Sender Address" button on the top right
- Enter Sender Name and Sender Address
- Check "Use as default sending address for this account" (optional)
- Click 'Ok' to save