You use mailbox
properties to set delivery restrictions, permissions, and storage
limits. To change these configuration settings for mailboxes, follow
the techniques discussed in this section.
Setting Message Size Restrictions for Contacts
You set message size
restrictions for contacts in much the same way that you set size
restrictions for users. Follow the steps listed in the next section.
Setting Message Size Restrictions on Delivery to and from Individual Mailboxes
Using the When The Size Of Any Attachment Is Greater Than Or Equal
To Limit transport rule condition, you can set restrictions regarding
the size of message attachments and specify what action to take if a
message has an attachment that exceeds this limit. Sometimes, you need
to set exceptions for specific users. For example, some users might
need to be able to send large files as part of their job.
You set individual delivery restrictions by completing the following steps:
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Open the Properties dialog box for the mailbox-enabled user account by double-clicking the user name in the Exchange Management Console.
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On the Mail Flow Settings tab, double-click Message Size Restrictions. As shown in Figure 1 you can now set the following send and receive restrictions:
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Sending Message Size
Sets a limit on the size of messages the user can send. The value is
set in kilobytes (KBs). If an outgoing message exceeds the limit, the
message isn't sent and the user receives a non-delivery report (NDR).
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Receiving Message Size
Sets a limit on the size of messages the user can receive. The value is
set in KBs. If an incoming message exceeds the limit, the message isn't
delivered and the sender receives an NDR.
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Click OK. The restrictions that you set override the global default settings.
Setting Send and Receive Restrictions for Contacts
You set message send
and receive restrictions for contacts in the same way that you set
these restrictions for users. Follow the steps listed in the next
section.
Setting Message Send and Receive Restrictions on Individual Mailboxes
By default, user mailboxes are configured to accept messages from anyone. To override this behavior, you can do the following:
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Specify that only messages from the listed users, contacts, or groups be accepted.
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Specify that messages from specific users, contacts, or groups listed be rejected.
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Specify that only authenticated users—meaning users who have logged on to the Exchange system or the domain—be accepted.
You set message send and receive restrictions by completing the following steps:
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Open the Properties dialog box for the mailbox-enabled user account by double-clicking the user name in the Exchange Management Console.
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On the Mail Flow Settings tab, double-click Message Delivery Restrictions. As shown in Figure 2 you can now set message acceptance restrictions.
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If you want to ensure that messages are accepted only from
authenticated users, select the Require That All Senders Are
Authenticated check box.
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To accept messages from all e-mail addresses except those on the reject list, under Accept Messages From, select All Senders.
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To specify that only messages from the listed users, contacts, or
groups be accepted, select the Only Senders In The Following List
option and then add acceptable recipients by following these steps:
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Click Add to display the Select Recipient dialog box.
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Select a recipient, and then click OK. Repeat as necessary.
Tip
You can select multiple recipients at the same time. To select
multiple recipients individually, hold down the Ctrl key and then click
each recipient that you want to select. To select a sequence of
recipients, select the first recipient, hold down the Shift key, and
then click the last recipient.
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To specify that no recipients should be rejected, under Reject Messages From, select No Senders.
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To reject messages from specific recipients, under Reject Messages
From, select Senders In The Following List and then add unacceptable
recipients by following these steps:
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Click Add to display the Select Recipients dialog box.
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Select a recipient, and then click OK. Repeat as necessary.
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Click OK.
