Relating to 2 Timothy
12
Letters of friendship (cf. 2 Cor 1:16; 5:3; Phil 1:7–8)
Family letters
Letters of praise and blame (1 Cor 11; Rev 2–3)
Exhortatory or paraenetic letters (1 Thess 1-5; the Pastorals)
Letters of mediation or recommendation (Phil 2:19-30, Philemon)
Juridical or forensic letters (1 Cor 9:3-12; 2 Cor 1:8-2:13)
Private or documentary letters
Official letters
Literary ...