Email subject lines are not just a combination of words that tell what an email is all about. Research has always shown that the subject line is the most important part because it creates the first impression, and determines whether that email will be opened, read, or deleted without so much as a glimpse.
The best subject lines are short, descriptive, and give your reader a reason to read on. Cheesy phrases or splashy lines will not help you stand out in the inbox… so keep it simple and to the point.
Words to Avoid
You may be surprised to know that certain words tend to trigger spam filters more than anything, and if your subject line contains these words then your message may fall into the wrong folder right off the bat.
Of course those are just a handful of examples. The point being that an overly sales-y subject line is not a good first impression, obviously.
What About Promotional Emails?
If somebody has opted in to a newsletter or email marketing newsgroup to receive promotions and special offers, how can you keep them interested in reading your emails?