Below is a sample of a good email.
Some points to consider when sending our emails (Especially to a new client the very first time)
Do not use Emoji's in the Subject line
Keep the body copy clean & limit number of links pointing to different locations
You can use the same link multiple times in the body copy if it is pointing to the Same Location or Landing page.
Limit the use use of company Logo's, signatures images, links to other websites etc.
The more links you have in the body copy the more likely you will get a lower score in "HTML Body Practices" when testing in Mailgenius
Add an Unsubscribe link in the footer
Add the mailing address of your business