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2. How can I validate an email address using a regular expression?

   stackoverflow.com/questions/201323

   After all, the best way to validate the email address is still to actually send an email to the address in question to validate the address. If the email address is part of user authentication (register/login/etc), then you can perfectly combine it with the user activation system. I.e. send an email with a link with an unique activation key to ...

3. What is the best Java email address validation method?

   stackoverflow.com/questions/624581

   What do you want to validate? The email address? The email address can only be checked for its format conformance. See the standard: RFC2822. Best way to do that is a regular expression. You will never know if really exists without sending an email. I checked the commons validator. It contains an org.apache.commons.validator.EmailValidator class.

4. python - How to check for valid email address? - Stack Overflow

   stackoverflow.com/questions/8022530

   The Python standard library comes with an e-mail parsing function: email.utils.parseaddr(). It returns a two-tuple containing the real name and the actual address parts of the e-mail:

5. C# code to validate email address - Stack Overflow

   stackoverflow.com/questions/1365407

   General steps are as follows: 1. does email address have a domain name part? (index of @ > 0) 2. using a DNS query ask if domain has a mail exchanger 3. open tcp connection to mail exchanger 4. using the smtp protocol, open a message to the server using the email address as the reciever 5. parse the server's response. 6.

6. How can I validate an email address in JavaScript?

   stackoverflow.com/questions/46155

   The only way to reliably verify that a supplied email is a working valid email is to send a mail with a verification link. So, if your use case does not demand that you verify the email, just do a minimal test for @, otherwise use a verification email. Regex will only provide bad user experience. –

7. How to confirm email address using express/node? - Stack Overflow

   stackoverflow.com/questions/39092822

   Shouldn't you also store the email address in the token object, and then check that the email address hasn't changed meanwhile? Otherwise, I could request a token to my old email address, change my email address in my account, and then verify that new address through the link that was sent to the old address. –

8. Sql script to find invalid email addresses - Stack Overflow

   stackoverflow.com/questions/801166

   CREATE FUNCTION [REC].[F_IsEmail] ( @EmailAddr varchar(360) -- Email address to check ) RETURNS BIT -- 1 if @EmailAddr is a valid email address AS BEGIN DECLARE @AlphabetPlus VARCHAR(255) , @Max INT -- Length of the address , @Pos INT -- Position in @EmailAddr , @OK BIT -- Is @EmailAddr OK -- Check basic conditions IF @EmailAddr IS NULL OR ...

9. How to Verify an Email Address in Python Using smtplib

   stackoverflow.com/questions/22233848

   I have been trying to verify an email address entered by the user in my program. The code I currently have is: server = smtplib.SMTP() server.connect() server.set_debuglevel(True) try: server.verify(email) except Exception: return False finally: server.quit() However when I run it I get:

10. How to check if an email address is real or valid using PHP

    stackoverflow.com/questions/19261987

    If it's really that important to verify an email address, the accepted way is to force the user to respond to an email. Send them a full email with a link they have to click to be verified. It's not spammy, and you're guaranteed that any responses have a valid address.

11. How should I validate an e-mail address? - Stack Overflow

    stackoverflow.com/questions/1819142

    private boolean Email_Validate(String email) { return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches(); } Make sure that after execute this method you should check that if this method return true then you allow to save email and if this method return false then display message that email is "Invalid".