'A' is accused of defaming 'B' by publishing an imputation intended to harm the reputation of 'B'. The fact of previous publication by 'A' respecting 'B', showing ill-will on the part of 'A' towards 'B' is relevant :
1
Because it proves the preparation for harming A's reputation
2
As it is necessary to explain fact in issue
3
As proving intention to harm B's reputation
4
As it is the effect of a relevant fact