I use 'Good morning [name] or sometimes just 'Good Morning' (or afternoon), or sometimes 'Dear [name] in an email; if it's a round-robin (which is often is) I just start with an attention-grabbing 'Ladies and Gentlemen' which seems to go down fairly well, apart from with one individual who has been making a fool of herself recently and is not much longer for this corporate world, I feel.
[Rosie] A gay couple. With stupid parents. :oP

[Néa, from whom all knowledge springs, from whose navel a lotus springs forth and who encompasses the oceans in three strides] I avoid salutations as unnecessary ornamentation.

[Salutations] For email, even formal email, I find that "Hello," is a perfectly good opening for almost every purpose. So much so that I now find it slightly quaint to receive an email that begins "Dear..." (particularly if the person uses my surname). And it's been many a year since I've seen a "yours faithfully". If forced into a formal signoff, I tend to stick to just "Yours," for fear of writing something I don't in the slightest bit mean, such as "sincerely".

[Dear Mr B-----,] While I am familiar with the feeling whereof you speak re: addressing someone by their first name prior to a formal introduction, which no doubt is deplored in Debrett, I can't say I've experienced a great deal of discomfort in discarding the convention.

In emails, I use "yours faithfully", "your sincerely", "regards" or "kind regards" depending on the context. I also use "cheers", which I use as a multi-purpose word in spoken coversation anyway. However, at the start of an email, I tend just to use the person's name (surname if we're not acquainted, forename if we are) or "Dear Sir or Madam" if it's to "complaints@????.com" or "service@????.com" (as many of my emails are).

[Phil] Whats the difference between regards and kind regards? I've never really appreciated this subtlety.

(pen) Sorry, but it's Christopher and Samantha. 50 yrs ago it would have been Christine and Samuel.

Now I come to look at it, Christine seems such a silly name. It's like the brand name of a sort of mini-Messiah individually wrapped for your comfort and convenience.

"Vicar, do you sell small packs of Christines for the weekend?"

[Projoy] Most names start to look pretty silly if you look at them too closely, like most words.

[Néa] I tend to use a first name and a colon. It's my style. For example:

Dear Samantha:

Isn't it about time you got off Humphrey's hand? I should think it was quite uncomfortable.

All the best,

Nights.

I think of an email as being a less formal letter - with an opening, closing and all the rest. Most of my peers think I'm bizarre for this.

hi nites i reckn your a yong fogy rosie

In email I don't use valedictions either, just my name at the end or a .sig. Written letters go "Dear Sir/Yours faithfully" or "Dear [name]/Yours".

Hmm, well showing my old-foginess I start with a "signature" saying who I am, website details etc. (Though this is automatically included) Then I use Dear (name) <comma> Dear Humphrey, Then the text - all properly written out and hopefully correctly spelt and punctuated. And I tail it with Regards, Blob (or whatever soubriquet that person knows me by) ........ What's more, I write SMS texts in much the same way !!!

(Nights) Actually most of my emails are no different from letters except in the greeting if I'm familiar with the person. This means capitals, punctuation and paragraphs. Well, why not? At my age you simply don't give a toss if people think you're bizarre. It's great.

The thing is, I tend to see emails as more closely related to memos than letters. When I receive an email written like a formal letter, it comes across, frankly, as somewhat illiterate.

[darren] How would you receive a letter through your letterbox? Would you feel impatience that they didn't email you about it?

[Projoy] It's a gut feeling thing. Although, if I sit and think about it, my regards tend to be much kinder if I'm selling than buying.

[pen] I'm not sure I understand what you're getting at there.