1.I hope you’re having a two-coffee day.
2.I hope you’ve had your coffee already.
3.Here’s the good news: Only [number] more days until Friday.
4.Happy “Not Tuesday”.
5.It’s me again.
6.I’m sorry if this message sabotaged your “inbox zero.”
7.How can I make your business easier?
差异化、个性化类：1.How are you holding up in the summer heat?
2.Are you also excited for [upcoming event/movie]?
3.How did your [recent project] turn out?
4.Congratulations on [recent accomplishment]
5.I hope you enjoyed your [event or vacation]
6.I loved Your recent [photo/article/social media post]
7.This [article/video/GIF] made me think of you.
8.I enjoyed your post on [subject]…
9.Welcome back from [vacation/event]…
正式又不失特色类：1.I hope this email finds you well.
2.I hope you enjoyed your weekend.
3.I hope you’re having a great week.
4.I hope you’re having a wonderful day.
5.I hope you’re doing well.
6.I’m eager to get your advice on…
7.I’m eager to hear your input on…
8.I’m reaching out about…
9.Thank you for the update