Hello, as per your question the first tip that I would be recommending to you is to focus on email subject line. Email subject line is the first thing that your readers would be viewing even before proceeding to the email body. Therefore, make sure that your email subject line is enticing enough to make your readers open the email. Keep an element of suspense in your email subject line while incorporating some offer to your emails works positively.
Second, try to write personalized emails while mentioning about some offer in your emails. This gives a feeling of being important in your reader's mind, and they instantly get attracted to your emails.
Third, make your emails short and crisp. Just mention the offer by adding attractive images and templates to your emails. This will again capture the attention of your readers thus making them fall in love with your email and offer. Also, add a click to action in your email body so that they can directly land up to the offer page of your website.