Vb net validating email address
These address validation methods are more efficient than validating multiple addresses individually in a loop, mainly because they group addresses with the same domain and validate them in one pass, which speeds up the process and lowers the resource usage and the possibility of IP blacklisting. Dim addresses As New List(Of Mail Address)() From ' Validate address list and display results.
The following example shows how to verify a collection of email addresses. Dim results As IList(Of Mail Address Validation Result) = Mail Address Validator.
Obviously there are expressions that you could use to determine if the format of an e-mail address is valid but you can also use the System.
Mail Address class to check if an exception occurs when creating the e-mail to determine if it is a valid or not : I suppose it depends on how you are currently sending it, but you might consider checking out this related Stack Overflow discussion along with this one which covers a few different techniques to try and check if your message was sent ().
I have triet in the same manner which you have explained as above.
Assuming the e-mail address is valid, you could look for known top-level domains, check the domain for an MX record, check for spelling errors from common domain names (gmail.cmo), etc.
Then present a warning giving the user a chance to say "yes, my mail server really does allow 🌮🍳🎁 as an email address." As for using exception handling for business logic, I agree that is a thing to be avoided.
But this is one of those cases where the convenience and clarity may outweigh the dogma.
Besides, if you do anything else with the e-mail address, it's probably going to involve turning it to a Mail Address.
Even if you don't use this exact function, you will probably want to use the same pattern.