View Letter Example Subject Images. Actionable subject lines will inspire people to click on your email by instilling urgency and for example, in an email inviting people to a hockey legend dinner, the email subject line might read. Salutation and the subject (the reason for writing the letter).
A subject line is not really necessary.
Example of how to write formal letter. Formal holiday request letter example. Formal business payment request letter example. Email subject line examples what else to include in your email