In its simplest form like this: [email protected], the atoms can contain 1. Most email validation checks assumes that the top level domain can have up to 4 characters. You have just validated the format – not its existence.

The only way to truly validate the email address is to send an email to that address and request the user to confirm by clicking on a unique link (or entering a confirmation code)Remember, if the user’s intention is to enter an invalid email address, she can do it so easily whether you have the most tough validation or not.

Count - 1 For i = 0 To i Cnt If File Exists(Attachment Files(i)) Then _ . Add(Attachment Files(i)) Next End If End With If SMTPServer "" Then _ Smtp Mail. Send(my Message) Catch myexp As Exception Throw myexp End Try End Sub Private Function File Exists(By Val File Full Path As String) _ As Boolean If Trim(File Full Path) = "" Then Return False Dim f As New IO.

Bcc = "" If Not Attachment Files Is Nothing Then i Cnt = Attachment Files.

Validating email address using regular expressions is tricky and is often not recommended. A valid email address as defined by RFC 2822 can be quite complex.

A valid email is of the format: [email protected] The name can be a set of ‘atoms’ separated by dots. single or double quotes and any character inside the quotes Now, to the domain part. MUSEUM .travel, .international or even .vermögensberatung For example all the following email addresses are valid: Source The sad truth is that despite the complex regular expression validation, the email may not be existing, so can still be invalid for practical purposes.

Mailgun’s email validation service is intended to validate email addresses submitted through forms like newsletters, online registrations and shopping carts.

Parses a delimiter-separated list of email addresses into two lists: parsed addresses and unparsable portions.

The parsed addresses are a list of addresses that are syntactically valid (and optionally pass DNS and ESP specific grammar checks).

Authentication using the Authorization Code Flow 3.1.1. Newlines can be represented either as a carriage return/line feed pair ("\r\n") or as a single line feed character ("\n").

Full mailing address, formatted for display or use on a mailing label.