As long as this practice was not done by the Salaf, we are not permitted to do it. That is why the scholars have said: It is not permissible to offer salām to a

Why? Because the abstention of the Salaf from greeting women in general, especially young women, was a preventive measure—to block the means to temptation (sadd Adh-dhareeʿah). As the old Egyptian poet once said: نظرة فابتسامة فسلام فكلام فموعد فلقاء "A glance, then a smile, then a greeting, then words, then a meeting." So, to prevent such chains of events, the wise Shari'ah closed the door to temptation and did not allow young men to greet young women, nor vice versa. I hope I have answered your question. ... Questioner: A Muslim man knocks on the door of another Muslim household. He knocks, and the wife asks, “Who is it?” and he replies, “As-Salāmu ’aleikum. I am so-and-so.” Is this permissible as well? Shaykh: Yes, this is permissible because there is no fitnah involved in such a case. Questioner: May Allāh reward you with goodness. Shaykh: And you as well. Source https://t.me/womensbenefits/909