How do the members of the Bennet family respond differently to Collins' letter announcing his intention to visit Longbourn?

Mr. Collins is a man with exaggerated and overly formal manners and he has a strange combination of self-importance and obsequiousness. Mrs. Bennet sees this as a great injustice for which Mr. Collins is responsible, but Jane and Elizabeth are resigned to the fact that they have no control over the inheritance laws and that Mr. Collins is not at fault for being in line to inherit their father's property.
Mrs. Bennet's gut reaction and sense of injustice with regard to the entailment of the estate serves to call attention to the injustice of English inheritance laws. Elizabeth and Jane, more moderate in their reaction, are inclined to accept the practice of entailment as simply part of the way their society works. While of course they do not like the fact that they will not be able to inherit their father's estate, their education has led them more or less to accept the conventional inheritance laws. Mrs. Bennet, on the other hand, through her unstudied and unguarded reaction, brings attention to the natural injustice of the law.
The younger daugters have mixed feelings because they don't fully understand the situation.The entailment of the estate will be a great hardship for the daughters. Without the sort of independent income which could be derived from an estate, they will need to marry well in order to secure their livelihood.