It’s possible to send email to anyone from anyone’s mail id without hacking it’s password.Technically,this is called as email spoofing.If you carefully notice your spam box I am sure you will get around 2-3 messages having id stevejobs@apple.com or gates@microsoft.com.At the end of this post you will find a widget from where you can send these types of spam mails.

According to Wikepedia Email Spoofing can be defined as ” A term used to describe fraudulent email activity in which the sender address and other parts of the email header are altered to appear as though the email originated from a different source. E-mail spoofing is a technique commonly used for spam e-mail and phishing to hide the origin of an e-mail message.”

These types of Spam messages are still can’t be filtered out by using GMail filters. Therefore I am still searching to find out there filtering method.While googling about this topic I stumbled upon Funmaza.com which have a software that can send these spam messages.Just try their software to send spam mails.