Possible Duplicate:
Should you use a comma/period after “Thanks”/“Regards” in email signatures?
I see answers on how to end a letter putting a comma after for example sincerely, like:
Sincerely,
Name
Is it incorrect to write it without a comma, like the following?
Sincerely
Name
Does the answer change if one used: "Best wishes", "Regards", "Cheers", etc.?