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.If the email address is invalid, the Mail Address class will throw an error which we can catch and return as a false.The best thing about this class is that it conforms to the RFC5322 specification for email addresses, so you are able to take advantage of this without writing loads of code.If you get Failure Report, you should consider to remove this recipient from your mail listing.We can validate email address at client side and server side.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.Moreover, to prevent email address testing, many email providers accept the recipient address at first no matter if the address is valid or invalid, only after you sent the email data to the server, then the server rejects it if the recipient address is invalid. If you don’t get Transport Error and Failure Report in 24 hours, that means the recipient is valid.
However, there may be times when you need to validate on the server. NET, I have always previously used some pretty gnarly Regex expressions. Mail namespace has a built-in class called Mail Address.To validate email address on client side, we can use java script with regular expression.Java script can check the regular expression pattern for valid email address.Full sample proejcts are included in this installer.
Install from Nu Get You can also install the run-time assembly by Nu Get. Firstly, Smtp Client performs a DNS MX record query.
Validate Email Address Syntax Regular expression can be used to validate if an email address is in correct format.