Similar narration is classified as a fabrication By Imam Saghani (rahimahullah) and Mulla ‘Ali Qari (rahimahullah). ‘Allamah ‘Ajluni (rahimahullah) concurs with their decision. (See Kashful Khafa, Hadith: 2416)

If this Hadeeth is fabricated and was not mentioned by Rasulullah ﷺ, the person who fabricated the Hadith as well as all those who convey the Hadeeth are deserving of the severe warning of Rasulullah ﷺ who said, “To fabricate my words is not like fabricating any other person’s words. The person who fabricates my words should prepare an abode for himself in the fire of hell.” (Sahih al Bukhari, Hadith #1291).

Unfortunately, due to wide spread ignorance, e-mails containing false information and fabricated Ahadeeth are widely circulated. The creators of such e-mails as well as those who forward them to others should take heed of the severe warning of Rasulullah ﷺ. It is therefore imperative that one exercises caution when one receives e-mails of such a nature wherein there is no authentic reference mentioned. Such e-mails or pieces of information should be referred to reliable and learned scholars for verification.

Note : Apparently some ignoramuses in fact also throw this report for the month of  Safar, Rajab and Dhul-Hijjah. So all you have to do is announce the news of either months and you’ll have 4/12 chances of getting into jannah every year if you were to believe everybody on the net !

And Allah Ta’ala Knows best

https://mawdu.wordpress.com/2009/12/07/hadith-whoever-first-month-rabi-awwal-fire-hell-haram/
https://hadithanswers.com/is-there-any-reward-for-announcing-the-commencement-of-rajab/
https://hadithanswers.com/hadith-whoever-gives-me-the-good-news-of-safar-departing/