Hi Patrick,

odoo provides very good email facility. You can send email to anyone with subject,cc, beautiful body etc.

And odoo provides lots of outgoing/incoming email services for sending/receiving email like gmail, yahoo, microsoft account etc.

There are lots of apps are available in odoo app store to get beautiful layout and integrate odoo with other email providers. 

Odoo provides channel system that you can send email from any contact/order with email channel for same communication.

To send email with subject,body,cc go to sales module create/open any quotation or in CRM you can find send mail button to send email.

https://goo.gl/xPMni9

Thanks and regards

Haresh Kansara