Hello,

For this, you need some customization. you can add a new action and call on your button send email button.

Hallo, you should Inherit from mail.template like :

_inherit = 'mail.template'

and then override generate_recipients() Method with:

@api.multi

def generate_recipients(self, results, res_ids):

return super(mail_template, self.with_context(tpl_partners_only=False)).generate_recipients(results, res_ids)

and then when you send an Email from Aktion Menu, a customer (res.partner record) will not be created

Hope that helps