I want to launch a wordpress website soon. I want to send

Hi, I want to launch a wordpress website soon. I want to send a personal email invitation to several VIPs. I would like to have an email that has my websites logo on it and a unique, professional look. But I don't want to use this email for mass email marketing. So Mailchimp and others won't work here. I am looking for a personalised email template that I can use for sending to individuals. Is there such a thing? I have been trying to find this on google, but can't. Can anyone help? Thank you.