Apple Mac OS X Server Migration For Version 10.3 or Later Manuel d'utilisateur télécharger pdf (Page 42)

42 Chapter 2 Mail Service Maintenance

Dealing With a Full Disk

Mail services become erratic and suffer from data corruption if the disk storing your

mail reaches maximum capacity. When your disk reaches full capacity, you’ll experience

the following behaviors:

• Postfix behavior

If the operating system can still spawn the smtpd process, Postfix will try to function

and attempt to accept the message. The message will then be rejected with a “disk full”

error. Otherwise, its behavior is unpredictable.

• Cyrus behavior

If the operating system can still spawn an imapd or pop3d process, the server will

attempt to open the user's mail account. Upon success, the user can access mail as

normal. Any changes that require database additions and causing the database to

grow can cause the process to hang and corrupt the database.

Working With Undeliverable Mail

Mail messages might be undeliverable for several reasons. You can configure your mail

service to forward undeliverable incoming mail, limit attempts to deliver problematic

outgoing mail, report failed delivery attempts, and change mail service timeouts to

increase chances of connection success.

Incoming mail might be undeliverable because it has a misspelled address or is

addressed to a deleted user account. Outgoing mail might be undeliverable because

it’s misaddressed or the destination mail server is not working.

Forwarding Undeliverable Incoming Mail

You can have mail service forward messages that arrive for unknown local users to

another person or a group in your organization. Whoever receives forwarded mail that’s

incorrectly addressed (with a typo in the address, for example) can forward it to the

correct recipient. If forwarding of these undeliverable messages is disabled, the

messages are returned to sender.

To set up forwarding of undeliverable incoming mail:

1 In Server Admin, select Mail in the Computer & Services list.

2 Click Settings.

3 Select the General tab.

4 Check “Forward mail addressed to unknown local users” and type a user name or group

name.

5 Click Save.

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Apple Mac OS X Server Migration For Version 10.3 or Later Manuel d'utilisateur Page 42