Comment 2 for bug 1441314

While the patch would successfully reject addresses like @gmail.com but other invalid addresses such as '..@gmail.com' , '...<email address hidden>' would still get accepted. To Ensure a perfectly valid address get accepted everytime, some regex matching needs to be done based on the format standards (like RFC - 5322) or better using Django validators which can save the cost of making a regular expression for an absolutely valid email