All modern authentication techniques are possible in Clang. What’s more, Clang assists you while composing and when it’s time to send it, so that you get the best possible result from your email marketing. For example, the warning that an image in the email is too large or a message about the suitability of the sender address in an email. In addition, Clang has an excellent reputation among Internet Service Providers such as Gmail and Outlook. Your email marketing benefits from this reputation.