Need help for Email template copywriting

[nifer]

I want to send bulk email to promote my service, but i don't like ChatGPT responds for it, I am getting tons of spam email every day and all of them are like this and i don't think this one work effectively, and in this case i think experience is more helpful than ChatGPT or YT Videos , Courses and Freelance Copywriters.
So, I'm here to ask from people who have experience in Email Marketing, What's the best guidelines to write an Email template to have higher open rate and chance of getting reply? I want to promote Digital Marketing related services for a specific niche

Personally i like short, simple and humanized , friendly emails.
i don't know yet should i just talk about just one service, or can i in a short line talk about other services.

Thanks

 

[Speni]

Most services use APIs, leading to only some AI backend. Hire some native writers. You will find many around the marketplace.

Good Luck