Do you send private, confidential or secure information inside an email? Don’t. Never. Ever.
You might already know that emailing from a public Wifi hotspot is a huge problem since it is so incredibly insecure (see my post You’re in Danger on Public Wifi! for more). Since all of your information passes in the clear, it’s trivial for someone to snag it and read it or download the attachments.
The kicker? Email heading across the internet, sitting on a mailserver, or being retrieved by someone else in a non-secured way means that your private, confidential, secure information is also exposed.
Two reasons you should care about your email getting hacked.