Many people also end their emails with "respectfully yours" these days, to sound more formal.
Tips
usage
In a letter the phrase is split in two: 此致 "herewith I extend" ends the body or stands indented on its own line, and 敬礼 "my respects" goes on the next line at the left margin, often with an exclamation mark. It works much like "Yours sincerely".
