1. A method of processing a message during a message exchange in a distributed computing environment, the method including receiving a message and, on the basis of the content of the message and an enforcement configuration policy providing a specified set of conditions dictating what enforcement actions should be carried out on the message and what order, selecting a plurality of the enforcement actions, from available enforcement actions, to be applied in a particular order to the message, providing an association or mapping between enforcement actions and respective interceptors; identifying interceptors that correspond to each of the enforcement actions based on associations which are administrator-editable and deploying an ordered interceptor chain comprising the identified interceptors to apply the selected plural enforcement actions in the particular order, wherein, in response to a detection of a fault by a deployed interceptor, determining, based on the fault, if a policy update is required and responsive to the determination: a) updating the policy; and b) deploying the updated policy.