Is there a way I can override the core email template that the admin will received once a guest sent message on contact form?
I would like to customize the look and feel of the received email. At least I can include a email header and footer.
I think an easy override like in joomla layouts and templates is not possible. If you want to modify your emails, you can...
/libraries/joomla/mail/mail.php
. Here you can wrap a template around your content.I´m with you, hope in the future there will be an easy native option to override mail templates.