Ruling on shaking hands with and kissing mahrams

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Check below answers in case you are looking for other related questions:
Sitting with non-mahrams in complete hijab
The husband’s grandfather is one of his wife’s mahrams

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Related Answers:
It is not permissible for a shaykh to be alone with a non-mahram woman in order to recite ruqyah for her
The husband’s father is a mahram for his son’s wife
Is it permissible for a woman to uncover in front of her husband’s mother’s husband?
Sitting with non-mahrams in complete hijab
The husband’s grandfather is one of his wife’s mahrams

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