recipientlimit specifies the total number of recipient addresses that will be accepted for the message. recipientcutoff compares the total number of recipients that were presented to the MTA to the specified value. No message will be accepted for delivery if the limit if the value is exceeded. Both keywords accept a single integer argument. The default for both infinite unless the corresponding channel keyword is specified.
Recipient limits can also be set on a sender or sender’s domain. This is done by specifying a user or domain LDAP attribute with the appropriate MTA option: LDAP_RECIPIENTLIMIT, LDAP_RECIPIENTCUTOFF, LDAP_DOMAIN_ATTR_RECIPIENTLIMIT, LDAP_DOMAIN_ATTR_RECIPIENTCUTOFF, and adding the attribute to the sender’s user entry or domain entry.