Validating email addresses in vb net Sexbots chat
Smtp Client then performs “RCPT TO” command to test if this SMTP server accepts this email address.
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.
Instead of using a regular expression to validate an email address, you can use the System.
Note that the regular expression is compiled using the System. This pattern can be repeated one or more times, and must be followed by the top-level domain name.
Text) Then Msg Box("The email address is valid.") Else Msg Box("The email address is NOT valid.", Msg Box Style.
You can't ever validate that an email address is actually valid for receiving email without sending an email to that address and seeing if the server accepts it for delivery. Show("Please enter a valid email id", "Checking") txtemailid. Mail Address(str Check) Catch ex As Exception Return False End Try Return True End Function The Internet and this site are shock full of incorrect attempts at solving this with a regex.
bringing it back from the dead, my first post even too. Can you explain the use of ""^[a-z A-Z][\w\.-]*[a-z A-Z0-9]@[a-z A-Z0-9][\w\.-]*[a-z A-Z0-9]\.[a-z A-Z][a-z A-Z\.]*[a-z A-Z]$" ?
Please consider giving me some rep points if I help you a lot. Technology is a dangerous thing in the hands of an idiot!
I need to know the best and easiest way to find out whether that email address is valid or not. I have tried using the below code but it does not display any message for me? Public Function Is Valid Email Address(By Val email As String) As Boolean Try Dim ma As New Mail Address(email) Msg Box(True, Msg Box Style. Information) End Try End Function does, but a lot of email address validation routines get it wrong, because the rules are more complicated than most people realize (en.wikipedia.org/wiki/E-mail_address#Syntax).
So be careful that you don't end up excluding users w/weird email addresses.
Test Recipients method can be used to test if the email address is valid. Firstly, Smtp Client performs a DNS MX record query.