What is the ruling on dealing with women relatives and acquaintances in light of severe mixing, and is it permissible for a man to: 1. Visit his maternal aunt's daughter, married or unmarried, in her home and greet her? 2. Greet his paternal uncle's daughter and congratulate her after marriage? 3. Ask to greet his paternal uncle's wife and daughters in their home? 4. Greet female colleagues and acquaintances in public places, and is refraining from that considered extremism? 5. Visit a sick woman to check on her?

It is permissible to greet a non-mahram woman, maintain kinship ties, visit the sick, and congratulate relatives, provided there is no fear of temptation (fitna). It is forbidden if there is fear of temptation. One must adhere to lowering the gaze and avoiding unlawful seclusion (khalwa). Intermingling (ikhtilat) is forbidden if it involves seclusion, lustful gazing, a woman dressing immodestly, or frivolous amusement and physical touching. Therefore, not greeting women for fear of temptation is entirely correct. Furthermore, the general rule regarding young men and women joining co-educational universities is prohibition, unless there are Sharia-compliant safeguards. As for shaking hands, its ruling has been previously explained.