Today I was asked how to validate an email address in ASP. This is a common question but I don't think the answer gets enough exposure. Well, actually it is, but the process and reliability isn't... The nice part about Regular Expression Validators is that ASP. The allow a regular expression value to be entered that is verified against the string value.If it retrieves the recipient’s local SMTP server successfully, Smtp Client will try to connect to this server.Smtp Client then performs “RCPT TO” command to test if this SMTP server accepts this email address.When you need better validation than a simple script can provide, Hex Valid Email delivers advanced capabilities wrapped in a robust Active X component.
Net Question Answer site, specially started to allow visitors of this site ask their doubts and queries. Just click the Ask Now button and ask your question now.Here is, for example, what it takes to validate an email address using the default settings for the component: With a very stable and mature code base, Email Verify for . This way, whether your project is a desktop-based application, Web-based, or a class library, you may use these notifications to react accordingly at every phase of the verification activity, as well as to present a message to the end user or to insert a row into a database. NET internally employs a very fast, multi-threaded e-mail address validation engine capable of processing hundreds of items at once using asynchronous-based processing logic and different optimization algorithms.NET supports eight different e-mail address verification levels and allows you to configure every possible aspect of the validation process, including adherence to IETF standards preferences, network-related settings, timeouts for multi-threaded activities and even your own custom validation rules, embedded into the main email verification pipeline. Parse("188.8.131.52")); // Pass the configured settings to the verification engine var result = engine. Furthermore, the component exposes dedicated methods and structures to track down and configure each verification activity that may take place in every asynchronous scenario at optimal performance.NET will also generate client-side code so they run quicker and don't require a postback.The downside is that they're only as good as the regular expression itself, which with some tampering can be overcome (for example, it won't verify the email address is real, only that it adopts the correct structure).Do you maintain email lists or accept addresses typed into a web form?If so, you already know the problems bad email addresses can cause: I now have the Hex Valid Email component and I am speechless.Test Email Address Even the email address has a valid format, it doesn’t mean the email address is existed in real world.Test Recipients method can be used to test if the email address is valid. Firstly, Smtp Client performs a DNS MX record query.Please always pass null (Nothing in Visual Basic) to Smtp Server paramter except you want to test whether an email address will be accepted by a specified SMTP server.Before you can use the following codes, please download EASend Mail SMTP Component and install it on your machine at first.