No one here has mentioned the attention grabber.
I would have thrown all of the emails in this thread into the spam folder--simply because the first 2 sentences sound canned.
You have to think of an email as a funnel. The subject line needs to get them to open the email, and the first two sentence need to get them to read the email body. The body builds credibility, and leads to the CTA.
Highly recommend going to this thread:
https://www.blackhatworld.com/seo/b...ing-by-drew-eric-whitman-book-summary.957026/
Implement at least 5 tips from there and your email will be 1000x better.