A security loophole in the official Gmail Android app opens the email spoofing attacks allowing anyone to change the sender email name. The issue dubbed Email Spoofing, enable the forgery of an e-mail header so that the email appears to have originated from someone else than the legitimate sender. The security team of Google rejected the bug report saying it is not a security vulnerability. Google Security Team member told Yan Zhu that Google does not consider a security issue the issue the e-mails spoofing.”]
Source: http://securityaffairs.co/wordpress/41983/hacking/android-gmail-email-spoofing.html