When the quote is part of a series of e-mails written by more than one person.
Explanation:
This is one occassion in which it would be appropriate to quote from an e-mail message in a response. In this example, several e-mails are being exchanged. Because of this, it would be easy for someone to get confused as to the order or the origin of certain pieces of information. This would be especially true if the emails are written by more than one person. By quoting from the e-mail, the sender ensures that tracking information within these emails becomes easier.
I learned how to navigate the computer efficiently. I learned how to use Ctrl + (key) to quickly do (something). ( Now reword that multiple times with different commands. ) Now I can harness my inner laziness to browse the computer at a faster speed.
