Since the advent of critical scholarship, the authorship of all the biblical texts have come into question. After the dust settled, it is commonly accepted that, of the thirteen letters attributed to Paul in the new testament, only seven were certainly written by him: 1 Corinthians, 2 Corinthians, Galatians, Philippians, Philemon, Romans, and 1 Thessalonians.
The three 'pastoral' letters are almost universally rejected as pseudo-Pauline (a wholly unrelated author pretending to be Paul many decades later), while Colossians and Ephesians seem to be generally accepted as deutero-Pauline (written with an authentically Pauline core, or written by a student of Paul's).
The outlier is 2 Thessalonians. Those who accept Pauline authorship say it fits his writing style and theology. Those who reject it say its eschatology differs too much, and even the author's insistence that he isn't a pseudonymous author is actually evidence he is. I don't see a majority position on this question.
What is the evidence regarding the authorship of 2 Thessalonians? Does it weigh in favor of pseudonymity?
(I expect strong answers to delve into issues such as early attestation of the letter, whether the Greek matches Paul's normative style and vocabulary in his seven 'authentic' letters, whether the theology and eschatology match Paul's, etc.)