Format Your Headlines Properly
Aside from ensuring that your headline satisfies spam filters, you must not forget about human spam filters — make sure that it does not put off your recipients!
One of the fundamentals of formatting headlines properly is to always double-check for spelling mistakes and observe proper punctuation.
A seemingly simple misspelling can make recipients doubt your professionalism.
Moreover, you should avoid writing subject lines in all caps and putting false promises. If they don't find in the body what you guaranteed to give them in the subject line, they most likely won't pay attention to your next emails anymore.
Including emojis in the subject line is also worth exploring.
An Experian report shows that 56%
of brands that include these in their subject lines have higher open rates. However, you must be careful when using them.
Unlike letters and numbers, some emojis aren't standardized. They can be displayed differently depending on the recipient's device.
If the emoji you used in your subject does not have support or does not exist on other keyboards yet, your recipient will only receive an ◻︎ in its place.