![]() This step will throw an exception, if the domain is not valid, so that you can flag that the email address is invalid. Socket s= new Socket(endPt.AddressFamily, ![]() IPEndPoint endPt = new IPEndPoint(IPhst.AddressList, 25) IPHostEntry IPhst = Dns.Resolve(hostname) String host = (address.Split( ' hostname = host Note that, this verifies only syntactical validity and not whether the email address exists or not. The following regular expression method in C#, would tell you, if the passed email address is syntactically valid or not. That is absolutely straight forward and we can define a regular expression to get the job done. Deep Network Checking where in the email server is contacted for the existence of the address.Ī very preliminary validation of email addresses is by analyzing the pattern of addresses.Soft syntactical validation of email address.The scope of this utility is two-pronged: In any web portal and/or applications, where a diversified set of users are expected to visit and register, care should be taken, in validating the email address, since this is being intended to serve as the primary medium of contact between the user and the website. For this, some sites have a primary email and a secondary email (if something fails in primary, the information to be communicated to the user would be sent to the secondary address). ![]() Even in the web applications we develop, the primary mode of information exchange between the website/application and the user is the email address.
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