Call to Action
At the end of your follow-up email, it's a good idea to add a polite call to action, such as, "I would appreciate a response by the end of the week" or "Can we arrange a quick phone conversation next Monday?"
The Call to Action should be specific and clearly indicate what the recipient should do in response to your email. It is best if it also immediately directs the user to the place where they can perform the action. An interesting solution is, for example, to diversify the message with a link to an electronic calendar that will allow the recipient to independently reserve one of the available places for a meeting.
Consistent tone setting
Depending on the target audience, industry, and other factors, the tone of follow-ups can vary significantly: from playful and light to very serious. Regardless of the circumstances, be sure to express gratitude to the recipient.

Even if the message is a reminder, such as a payment deadline, it is important to make the recipient feel respected and appreciated. You can do this by saying things like “Thank you for your time” or “Thank you for reading my message.”
Personalization and adaptation to the recipient
Remember that your message should always be tailored to the recipient (and that's almost every message, not just a follow-up email ). The more personalized the email, the more likely it is to be received positively.
Contrary to appearances, personalization does not exclude automation. Dynamic fields in messages can be used to, for example, address each recipient by name or surname, without having to manually edit individual emails.