Analysis of information sources in references of the Wikipedia article "Epistle" in English language version.
Scholars normally place the thirteen Pauline letters of the New Testament into three categories: The Pastoral Epistles of 1 and 2 Timothy and Titus, which are very widely recognized as having been written by someone other than Paul; the Deutero-Pauline letters of Ephesians, Colossians, and 2 Thessalonians, which are fairly widely as being written by other authors (three different authors; these must be judged as authentic or not on a case by case basis); and the other seven letters, which are called the 'Undisputed Paulines': Romans, 1 and 2 Corinthians, Galatians, Philippians, 1 Thessalonians, and Philemon.