Thought this was an interesting email footer from an iPhone user:

I love stuff like this.

Some would consider this sarcasm, but I truly believe it's just transparency. This person simply wants to be up-front and honest with those they correspond with, and this is a great way to do it.

Yes, it's "cool" to have "Sent from my iPhone" in your email footers (it makes you appear elusive, or "always on the go"), but really it's clumsy and tiresome to send emails using such a small keypad while being physically mobile, so I don't see any harm in letting your recipients know that.

Just that extra sentence speaks a lot about the person behind it. It reminds you that they are human, and nobody is perfect.

They're saying, "Yes, technology is great, but often it muddles message craftsmanship and/or intent. This is just some preventative maintenance."