Question

I’m trying to validate a list of email addresses using the following code:

Public Function ValidateEmailAddressField() As Boolean
    Dim isValid As Boolean = True
    Try
        txtServiceEmails.Text = txtServiceEmails.Text.Trim.Replace(",", ";")
        Dim validateMailAddress = New MailAddress(txtServiceEmails.Text.Trim)
        Return isValid
    Catch ex As Exception
        isValid = False
        Return isValid
    End Try

End Function

When I enter “johndoe@amce” or “johndoe@acme, [e-mail]” the code validates true. Is entering an email address without an extension, such as “.com”, actually considered a valid email address?

Thanks,

crjunk

Answer 1

In an cooperation environment, a domain does not have to have .com/net/org… ‘acme’ could be a valid domain, so, the email me@acme could be a valid email address internally.

usually, people use regular expression to valid email address. there are lots of examples.