A man harassed by anti-war mail after his son was killed in Afghanistan says immigrants who can't adapt to Australian life and values should live elsewhere.

Private Gregory Michael Sher, 30, was killed in a rocket attack in Oruzgan Province, in southern Afghanistan, in January.

He was the eighth Australian Defence Force soldier to be killed in Afghanistan since 2002, but the first to die as a result of indirect fire.

Mr Sher's father Felix received a phone call and letters, allegedly from self-styled Muslim cleric Sheikh Haron, just before his son's funeral.

"I feel bad that you have lost your son but I don't feel bad that a murderer of innocent civilians has lost his life," a line in one of the letters reportedly said.

Other Australian families of men killed in Afghanistan have allegedly received similar letters in the past two years.

On Tuesday Haron was charged with seven counts of "using a postal service or similar service to menace, harass, or cause offence".

He was granted bail to appear in court on November 10.

Mr Sher says he's now waiting for justice to take its course.

"There is no point in getting angry or upset, nothing is going to be achieved by it," he told Fairfax Radio Network on Thursday.

Asked if he had something to say to Mr Haron, Mr Sher called on immigrants whose values were not in line with the general community to live elsewhere.

"What I would like to say (is) that when people immigrate to Australia, when they actually do so with the intention of integrating with the general community and living in peace and harmony, rather than confronting it, and causing tension and conflict, and irrespective of what one's religious beliefs are, one can still live happily with the community but not dissolve," he said.

"If people don't like what's happening in Australia, live elsewhere."