Invoicera by-default sends out emailers from do-not-reply@invoicera.com and uses your organisation name as “From Name”. If you wish to setup your own email address as the “From” email address, you would need to setup your own SMTP server or use a 3rd party SMTP servers due to various authentication tests in place by various ISPs, like Google, Yahoo and Microsoft.

Instructions to configure your own or 3rd party SMTP server may be found here