How come my login is a non-existent email address?

November 17, 2016 | by

The “Welcome to Your Marketo Developer Sandbox” email contains a login of the form “dev@<company_name_here>.com” which is not an actual email address.  This login is simply a machine-generated string that is created during the provisioning process.  The recipient of the email is the actual email address that is associated with the partner sandbox.