Are you sinful Ustadh if you don’t say Salam or respond to the Salam (text) from your ex husband while communicating about the child’s custody matters or is it a must you respond with a Salam to him as he’s a na. mehram man to you now .

Ustadh AbdulAziz al-Haqqan

You can reply to the salaam even to strangers in your normal voice, without extra femininity and what some women sometimes do to Sound more attractive.