The England team won the Women's World Cup and the World Twenty20 title in 2009.
Rainford-Brent received a hate letter telling her to leave the country.
Rainford-Brent was the first black woman to play for England and is now the director of women's cricket.
She posted a picture of the abusive letter on social media.
She wrote that she was found naked in Africa as a primitive.
I had some letters in my time, but this one is up there!
Rainford-Brent posted a letter with expletives on the internet a day after ex-Yorkshire player Azeem Rafiq gave emotional testimony to the committee.
Rafiq said that English cricket is "institutionally" racist when he spoke at the DCMS hearing.
Rainford-Brent was part of the England team which won the Women's World Cup and the World Twenty20 title in 2009.
She retired from international cricket in 2012 after playing 29 times for England.
Rainford-Brent was made an MBE in the Queen's birthday honours list for her services to the sport, charity and broadcasting.
The letter was called "horrendous" by a former England bowler and "disgusting" by an Australia international.
"Cricket is very lucky to have you," Haynes said. Hope you're doing well.
Monty Panesar said that it was repulsive. We are with you.
