no1. Your emails are not being read.
BIG FACT: Nothing happens until the email is opened. And with spam filling 90% of your inbox, your subject line needs to stand out with a what’s-in-it-for-me? subject line.
no2. You’re using a poor mailing list.
The better the match between your product/service and your target list, the better the response. Mail to shorter and better lists.
no3. Your emails are too long.
Short emails get higher click-through rates. 3-5 short paragraphs, 35-55 characters per line. Say one thing only. Ask, what does my customer consider valuable? And write your email around that value.