Bismillah Ar-Rahman Ar-Raheem
In the name of Allah, the Most-Merciful, the All-Compassionate
Assalamu 'Ala man Tabee'a Al-Huda
Peace be upon who follows the true guidance
Praise be to Allaah, we seek His help and His forgiveness. We seek refuge with Allaah from the evil of our own souls and from our bad deeds. Whomsoever Allaah guides will never be led astray, and whomsoever Allaah leaves astray, no one can guide. I bear witness that there is no god but Allaah, and I bear witness that Muhammad is His slave and Messenger.
It is known in the religion of Allaah that it is forbidden to follow in the footsteps of the Shaytaan. Everything that could lead a person to fall into haraam things is also haraam, even if in principle it is originally permitted. This is what the scholars call “the principle of warding off harm.”
Concerning this matter, Allaah says (interpretation of the meaning): “O you who believe! Follow not the footsteps of Shaytaan.” [al-Noor 24:21].
With regard to the second matter, He says (interpretation of the meaning): “And insult not those whom they (disbelievers) worship besides Allaah, lest they insult Allaah wrongfully without knowledge…” [al-An’aam 6:108]
Here Allaah forbids the believers to insult the mushrikeen lest that leads to them insulting the Lord, may He be glorified and exalted.
There are many examples of this principle in sharee’ah. Ibn al-Qayyim (may Allaah have mercy on him) mentioned many of them and explained them well in his excellent book A’laam al-Muwaqqi’een. (See 3/147-171 thereof).
The issue under discussion here also comes under this category. Conversation – whether verbally or in writing – between men and women is permissible in and of itself, but it may be a way of falling into the traps of the Shaytaan.
Whoever knows that he is somewhat weak, and is afraid that he may fall into the traps of the Shaytaan, has to refrain from such conversations, in order to save himself.
Whoever is sure that he will be able to remain steadfast, then we think that it is permissible in his case, but there are certain conditions:
1- The conversation should not be allowed to wander too far from the topic being discussed; or it should be for the purposes of calling others to Islam.
2- They should not let their voices be soft, or use soft and gentle expressions.
3- They should not ask about personal matters that have no bearing on the matter being discussed, such as how old a person is, how tall he or she is, or where he or she lives… etc.
4- Other brothers (in the case of men) or sisters (in the case of women) should take part in the conversation or read the correspondence, so that the Shaytaan will find no way to enter the hearts of the people who are conversing or corresponding.
5- The conversation or correspondence must be halted immediately if the heart starts to stir with feelings of desire.
Finally, I hope that everyone who reads this will be guided to the correct way and to follow the truth. May Allaah protect you and us from all evil.