Nicholas Scales, 41, told Stuart Andrew he should “Stop wasting police time and get your f****** job done”, Leeds Magistrates Court heard.
Scales then called the Pudsey MP a “queer mammies boy” and said: “You Tory c**** are all the same, the sooner the IRA restarts and bombs your conference again the better.”
He also suggested the politician should go out in Leeds and Bradford to “toughen up”.
The court heard how Scales, of Upper Hale Road, Farnham, Surrey, sent the email to Mr Andrew’s constituency office in Leeds.
It arrived three days after the MP was attacked by Eric Joyce, the Labour Member for Falkirk, in the House of Commons’ Strangers Bar in February.
Scales pleaded guilty to sending a malicious communication last month.
He was due to be sentenced today but magistrates heard the probation service still needed paperwork from the defendant in order to complete its report on him.
The court heard that probation officers needed to work out whether Scales, who has suffered from mental health problems, was fit for unpaid work.
Scales was bailed and will now be sentenced on August 22.