1.A Sunnah divorce is one in which the man issues one talaq (divorce) to his wife during a period of purity (i.e., when she is not menstruating) in which he has not had intercourse with her, then he leaves her alone until her `iddah ends. A bid`ah (innovated) divorce is when the husband divorces his wife three times, or during menses, or during a period of purity in which he has had intercourse with her.
2. Intercourse means penetration of the head or tip of the penis into the vagina. Intimacy without intercourse does not come under that heading, regardless of whether ejaculation occurs or not. So if no vaginal intercourse took place, then the divorce was issued, it is a Sunnah divorce.