[ghaff]

It's also perfectly legal to just reply to an email "Looks good to me." That doesn't mean it's legally compliant for all use cases. Perfectly fine for others of course. Just print out and file the emails or save them in a folder.

[withinboredom]

Well. I guess it depends. An X is a perfectly legal signature, or a smiley face.

As long as all parties agree that it’s a signature.