If someone doesn’t like your subject line, they won’t open your email.
According to Research, 47% of email recipients open emails merely based on the subject line.
I have got a Cold Mail Tool, Called My Lead Gen Secret
As you can see from my MLGS stats above, I can see which Email had the best Open Rate and Click Through Percentage.
You need to track it to get a feeling what Subject Line Works the Best esp for Cold Emails.
Also you need to avoid wordings like:
“Billing”,“Debt”,“Claim your free”,“Cheap”,“!!!!”,“Don’t delete”,“Not spam”
Keep it brief. For practical reasons, keep the subject line brief. Most email clients only display the first 50 characters, so anything you write beyond that limit doesn't really matter.
Ask a question. Questions pique curiosity and inspire readers to open an email in search of an answer.
Mention a deadline, if applicable. Sometimes a deadline makes an email a priority. Tell the recipient when your offer expires or when you need an answer, such as This special offer is only available for one more week