If it is not known whether a person is a Muslim or a kaafir, can we say salaam to him?

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Check below answers in case you are looking for other related questions:
Giving salaam is Sunnah when joining a gathering and when leaving it
Wiping the face after du’aa’ and placing the hand over the heart after greeting someone

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Related Answers:
Responding to a kaafir when he says salaam to a Muslim
Giving salaams to people in the mosque during the khutbah
Ruling on greeting women with salaam and returning their greeting
Giving salaam is Sunnah when joining a gathering and when leaving it
Wiping the face after du’aa’ and placing the hand over the heart after greeting someone

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