Email is an interesting beast. Most threads I'm involved in start out very formal with the requisite 'Dear So-and-so' at the beginning and some sort of formal-i

Email is an interesting beast. Most threads I'm involved in start out very formal with the requisite 'Dear So-and-so' at the beginning and some sort of formal-ish signature. But by the third back and forth, most people abandon the formalities and start signing with just their name, or not at all. I prefer not to have to bother, as it has been noted, my full name and email appear in the mail headers, and I use proper top quoting format whenever possible.