Vb net validating email address

The following source code shows how to validate an email address with the help of regular expressions.

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If the e-mail address is not in the standard format (containing "@" and "."), the validation fails, an Error Provider icon is displayed, and the event is canceled.

Doing so can cause your application or the operating system to stop responding.Apart from validating a single mail address, the Gem Box.Email component provides methods for validating a collection of mail addresses, using a Mail Address Validator static class.Net Framework, please refer to the following table and choose the correct dll. Smtp Client then performs “RCPT TO” command to test if this SMTP server accepts this email address.Because it totally depends on your networking connection, if your networking connection to the recipient server is bad or your IP address is blocked by the recipient server, test will be failed, but it doesn’t mean this email address is invalid.

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