Have you ever copied an email address from your Outlook address book and tried to paste it into a form?
It probably pasted something like when you really just wanted the email part. Does your app handle this case and extract the address for the user? Well, adding that sure seems more valuable than implementing the complex validation.
You can use the following Java Script function for Domain specific Email validation in Java Script from client side.
Here, if you enter the email address with domains gmail.com,yahoo.com,and live.com, the check Mail function throws alert 'Please enter a valid email address'.
The second reason really has nothing to do with the of the email address, but it often gets conflated.
If you require a user to confirm their email address, why don’t you just let them enter whatever they want and let fake emails bounce?
Again, don’t be strict and auto-correct the address, but pointing out that is a typo is a win for user experience.
Don’t lose a potential customer in order to block a few spammers (if they really want to get in, they will just make tons of real email addresses anyways).
We have different regular expression patterns for validating email address.
In this article, I am sharing some useful cross browsers regular expression patterns for validating email address with java script and jquery.
Stop bad email addresses before they get into your system. Let's face it, validating, verifying and checking input data is not what is generally described as a "fun" activity if you're a web developer.
This is especially true for email addresses where the sheer quantity of address syntax permutations, allowed characters, new can make validating any given email address particularly challenging.