Including the receiver’s name in an email subject line increases their attention. Open rates increased 6-23%, clicks by 7-32% and unsubscribes fell 11-17%
Anecdotally, I would have to agree. Most of you will have received some sort of follow up email from me after sign up to check in on delivery and to take feedback if you want to give it - and I put [Firstname] in subject line to get around 45-50% OR. Have a read
here, give this a go if you’re not already doing it.