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 specified 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 specific server.
You might need to use this method to deliver outgoing mail through the firewall set up by your organization. In this case, your organization will designate a server for relaying mail through the firewall.
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:
1In Server Admin, select a computer in the Servers list, then select Mail.
2Click Settings.
3Click the General tab.
4Click “Relay outgoing mail through host” and enter the DNS name or IP address of the server that provides SMTP relay.
5Click 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:
1In Server Admin, select a computer in the Servers list, then select Mail.
2Click Settings.
3Select the General tab.
4Select “Copy undeliverable mail to” and enter a user, group name, or alias.
5Click Save.
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Chapter 2 Mail Service Setup
