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Relaying SMTP Mail Through Another Server
Rather than delivering outgoing mail to its destinations, your SMTP Mail service can
relay outgoing mail to another server.
Normally, when an SMTP server receives a message addressed to a remote recipient,
it attempts to send that message to that server or the server specied in the MX
record, if it exists. Depending on your network setup, this method of mail transport
might not be wanted or even possible. You might then need to relay outbound
messages through a specic server.
You might need to use this method to deliver outgoing mail through the rewall set
up by your organization. In this case, your organization will designate a server for
relaying mail through the rewall.
This method can be useful if your server has slow or intermittent connections to
the Internet.
Do not attempt to relay mail through a mail server outside your organization’s control
without the relay administrator’s permission. Trying to do so will label you as a Mail
service abuser.
To relay SMTP mail through another server:
1 In Server Admin, select a computer in the Servers list, then select Mail.
2 Click Settings.
3 Click the General tab.
4 Click “Relay outgoing mail through host” and enter the DNS name or IP address of the
server that provides SMTP relay.
5 Click Save.
Copying Undeliverable Incoming Mail
You can have Mail service copy messages that arrive for unknown local users to
another person or a group in your organization, usually the postmaster. You can
use this setting to track mail delivery failures such as SMTP connection rejections or
misaddressed mail, or to determine the source of junk mail.
To keep a copy of undeliverable incoming mail:
1 In Server Admin, select a computer in the Servers list, then select Mail.
2 Click Settings.
3 Select the General tab.
4 Select “Copy undeliverable mail to” and enter a user, group name, or alias.
5 Click Save.
28 Chapter 2 Mail Service Setup