In odoo, when we send the mail if the partner is not created then odoo create first then send the mail on the partner email,

but I do not want to mix with lead & contact, so I have added the code def generate_recipients with pass the context with tpl_partners_only  is False.

& I have set the email to which I have to send them directly email without creating the partner.

Now Issue -if I send the mail then odoo does not make the email for the same instead of making the message.

so how to send mail to an only email address without creating a partner in the system.