If you’re sending Super Formal Emails like to Bosses, writing serious work emails,corporate-level stuffUse👉 Best regards – Super safe, professional, never wrong.👉 Sincerely – A bit serious, but solid if it’s a formal letter.👉 Yours faithfully – Only if you don’t know their name (mostly UK people use this).If you’re sending Professional but Friendly Emails to Clients, managers, people you emailoftenUse👉 Kind regards – A little softer than “Best regards.”👉 Warm regards – A tiny bit friendlier