All Paul's letters begin and end in the same way we now send emails. The 'header' identified Paul as the author and sender – often reminding his readers that he was commissioned into the service of the Lord Jesus Christ and speaking with His authority. The signature in the 'footer' comes after personal greetings. The end of the original scroll would have been in Paul's own handwriting. All the rest of the letter was scribed by a colleague as Paul dictated, which is one reason why the epistles seem to be more personal as if he was speaking … because he was.