Verimail keeps validating on keyup, which means, as soon as you start typing, you get an error message.Generally great plugin, but this one is a deal breaker - I would prefer to validate only when triggered manually, i.e.An email client that fully understands TNEF, such as Outlook, processes the attachment and displays the original message content without ever displaying the attachment.e Mudhra Limited is a Certifying Authority licensed by Controller of Certifying Authorities, under Government of India.There are two types of settings you can use: TNEF is a Microsoft-specific format for transmitting formatted email messages.A TNEF message contains a plain text version of the message and an attachment that packages the original formatted version of the message. The attachment includes formatting, attachments, and Outlook-specific features such as meeting requests.

The member ‘rc’ (or return code) is used to communicate back if the validation was successful or not.

it merly checks if the syntax of any email is valid or not.

Its only to help the user writing the correct address. Most times you just want to validate that the user entered the email in the right format. So I like this better than the original answer but a Septik's answer is comprehensive and I up-voted that as well.

Let’s take a look at how to do that with a text field that is only supposed to have a value of either ‘AAAA’ or ‘BBBB’ (yes, I know that this does not make much sense in a real PDF form).

So, if the user enters ‘01234’ we should see an error message that would instruct the user about what type of data is valid for this field.