No. E-mail is a common noun, so it does not require a capital letter.
No, except at the beginning of a sentence because it is n ot a proper n ou n.
Yes, "Kind Regards" should be capitalized as it is a formal closing in a letter or email.
Yes, you should capitalize "About" in a title.
Best should be capitalized but wishes should not. Thus becoming: Best wishes.
it depends , unless you want to
Yes, you should capitalize the C in Century.
No, you should not. You should only capitalize a word when it is at the start of a sentence or when it is a proper noun.
You should capitalize Colosseum when referring to the specific ancient Roman amphitheater in Rome.
Yes, you should capitalize "The Rotunda" as it is a specific place or location.
no
No
No