Abstract: An application such as a mail transfer agent (MTA) enforces a resource quota within a multi-tenant environment. An email associated with a tenant is managed based on decisions evaluating the email against a queue quota and an association between the email and an email storm. The email is also managed based on another decision evaluating the email against a processing quota. In addition, the email is managed based on a cross MTA aggregate of usage information associated with the first, second, and third decisions.

Abstract: An application such as a mail transfer agent (MTA) enforces a resource quota within a multi-tenant environment. An email associated with a tenant is managed based on decisions evaluating the email against a queue quota and an association between the email and an email storm. The email is also managed based on another decision evaluating the email against a processing quota. In addition, the email is managed based on a cross MTA aggregate of usage information associated with the first, second, and third decisions.

Abstract: The present invention provides for a messaging system that automatically identifies a forest that corresponds to a particular recipient of a message, without using a common or unified directory that maps forests with recipients. In a network with multiple forests, each forest having multiple recipients, when a message is received at a message server with a destination address that does not uniquely identify a particular forest, the present invention provides for using a standard messaging protocol for quarrying each forest. The forests respond with status codes that indicate whether or not a recipient associated with the destination address corresponds to the forest being quarried. If a status code indicates that the recipient corresponds to the particular forest, information may be stored and used to quarry that particular forest first, before quarrying other forests within the network.