How to check the givem email address exists or not using ASP

Question

Not in the database, See I am giving an example, Like if you enter a email address and click on the submit button, we are suppose to check the entered email address is correct or not. I am not talking about the validation its about the domain checking.
example, [email protected]
[email protected]
[email protected]
[email protected]

Saineshwar Bageri · Answer

Hi Paresh Patel, you need all type of domain for this and it is not possible . If any one is providing this it must be Paid one . Mean while there are lakh and crore of domain how you wil check . just validating it will be right one . If you got your answer then Mark it as Accepted .

Rajeesh Menoth · Answer

Hi, Check this one : http://www.codeproject.com/Articles/22777/Email-Address-Validation-Using-Regular-Expression

Paresh Patel · Answer

ok thanks.is it not possible?

Sumit Joshi · Answer

Hi Paresh, Email address can be appended by some company name like abc@technophase.com this email is a valid mail addresss so we check only the format not any mail provider If helpful mark as Correct Answer

Rajeesh Menoth · Answer

Hi, Check the following articles : 1) http://www.dotnet-tricks.com/Tutorial/javascript/UNDS040712-JavaScript-Email-Address-validation-using-Regular-Expression.html 2) http://www.codicode.com/art/free_asp_net_email_validator_verifier.aspx 3) http://www.codeproject.com/Articles/5189/End-to-end-Email-Address-Verification-for-Applicat

Paresh Patel · Answer

any solution of this question? I check all Domain. please give solution. Advacance thanks

Saineshwar Bageri · Answer

you need all type of domain for this and it is not possible you can have some of them in database and check against it.

Raja T · Answer

Hi Paresh, You can use the below query for this validation. select * from tbl_name where SUBSTRING(email,CHARINDEX('@', tbl_email),20) like SUBSTRING('" & given_email & "',CHARINDEX('@', '" & given_email & "'),20) In this query we are validating weather the domain of given email id ( given_email ) is present in the domain of emailid which is in the table( tbl_email ). If condition returns false you can give validation using javascript.

Rajeesh Menoth · Answer

Hi, Try this one : http://www.aspnetmx.com/demo.aspx

Paresh Patel · Answer

this code only check gmail account. i check all type mail check, like yahoo,gmail,hotmail,raddiffmail.

Saineshwar Bageri · Answer

Hi Paresh check out this link http://www.c-sharpcorner.com/UploadFile/kirtan007/check-if-email-address-really-exist-or-not-using-C-Sharp/