Different punishments and penalties have been reported, in our religious sources, for the sins mentioned in the question. We will suffice to quoting a few traditions in this regard:

A) Shaking hands with a non-mahram:

1. The Holy Prophet (s) said: "Any man who shakes hands with a non-Mahram woman comes on the Day of Resurrection handcuffed then he will be ordered to the Fire."[1]

2. "Any man who shakes hands with a non-Mahram woman, without doubt he has made himself deserving of wrath and displeasure from Allah."[2]

B) Physical contact with non-Mahram: There are different forms of a physical contact with a non-Mahram. They include shaking hands (about which narratives were mentioned above), touching, "adultery" etc. There are different traditions in this regard some of which are as under:

1. The Holy Prophet (s) says: "Any man who hugs a non-Mahram woman, he is tied together with Shaitan to a chain of fire and both of are dragged and thrown unto the fire."[3]

2. Imam Reza (a.s.) said: "On the night of Me'raj (ascension), the Holy Prophet (s) saw a group of women who were subjected to punishment.[4] On that night a woman was seen having her face and body being cut by a (pair of) scissors. This was the punishment for showing her body and private parts to other men.[5]

C) Not wearing hijab: In the same foregoing tradition, it has been narrated that the Holy Prophet (s) saw a woman hanging by her hair and her brain was boiling. (This was the punishment of that woman who did not hide her hair by covering her head from men).[6]

For further information in this regard, see the following relevant indexes:

"Hijab in Islam", question 431 (site: 459).

"Philosophy of Women's Dress Code", question 825 (site: 884)

"Shaking hands with non-Mahram women", question 527 (site: 574)

"Haram and Sinful Gazes", question 1396 (site: 1420)

"Hugging a non-Mahram woman", question 6074 (site: 6257)

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