Would a pre-assembled corpus of spam be ok for your needs? https://www.google.ru/search?ie=utf-8&oe=utf-8&q=spam+corpus https://www.google.ru/search?ie=utf-8&oe

Would a pre-assembled corpus of spam be ok for your needs? https://www.google.ru/search?ie=utf-8&oe=utf-8&q=spam+corpus https://www.google.ru/search?ie=utf-8&oe=utf-8&q=spam+corpus