Imaam Ajal Hazrat Imaam Qaazi Iyaaz (Allaah be pleased with him) says:

Accept this, undoubtedly the respect and honour of the Holy Prophet (Sallal Laahu ‘Alaiehi Wa Sallam) and his reverence and esteem, is mandatory and necessary after his departing also like it was mandatory and essential during his worldly life. And its expression should be done especially at the time of his sacred remembrance, at the time of recitation of his sacred Hadees [Narration], at the time of listening to his Sunnah [Tradition], his sacred name and his sacred life [Seerat-e-Taiyyibah].

(Shifaa Shareef, vol-2, pg. 32, Subulal Hudaa, vol-12, pg. 394)

It is proven the respect and honour of the beloved Holy Prophet (Sallal Laahu ‘Alaiehi Wa Sallam) is precisely the exact Ieemaan [Faith] rather it is the soul of Ieemaan. And in this era filled with evils [Fitnah] when the love and importance of the Holy Prophet (Sallal Laahu ‘Alaiehi Wa Sallam) is being taken out from the hearts of the people it is very important and necessary that in the hearts of the Muslims his real love, devotion, respect and honour is enlightened.

Excerpt from the Book ‘Zikr e Jameel’ by Hazrat Maulana Muhammad Shafee Okarvi [Rahmatul Laah Alaieh]