Supporting Messaging Clients

Set Recipient Limits

You can determine the maximum number of recipients for a single message sent in one connection. Some clients return messages with an NDR, indicating that the maximum number of recipients has been exceeded. Exchange does not return messages in this instance. Instead it opens a new connection immediately and processes the remaining recipients. For example, if the recipient limit is set to 1,000 and a message with 1,050 recipients is received, the first 1,000 are delivered in one connection. Then a new connection is opened and the message is processed for the remaining fifty recipients.

To set recipient limits:

  1. Start System Manager
    On the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
  2. Navigate to the SMTP virtual server.
    1. Servers
    2. Server
    3. Protocols
    4. SMTP
    5. SMTP virtual servers
    6. SMTP virtual server
  3. Right-click the SMTP virtual server, and then click Properties.
  4. On the Messages tab, in Limit number of recipients per message to, type a number to represent the recipient limit.

Note   Recipient limits set on the SMTP virtual server apply to incoming messages. Some recipient limits can also be set globally on all user mailboxes and individually on specific mailboxes. Mailbox limits can apply to both incoming and outgoing messages.

Related Topics

Set Delivery Restrictions