You may be on vacation, but hackers are not. Summer is the peak season for having your email account hacked, so Google, Hotmail and Facebook have implemented a system called 'two-factor authentication' to protect your login information.
This article titled “How Google, Facebook and Hotmail aim to stop holiday hacking” was written by Charles Arthur, for guardian.co.uk on Friday 5th August 2011 16.51 UTC
“My Google email account was recently hacked into whilst I was on holiday in Slovakia. The hacker said that I had been robbed at gunpoint in Spain and robbed, then asked people to send money to a money transfer account in Spain,” read the email that arrived this week. “This has happened to other people, I gather.”