Apple Mac OS X Server Version 10.4 or Later Manual do Utilizador descarregar pdf (Página 35)

Chapter 1 Mail Service Setup 35

Relaying SMTP Mail Through Another Server

Rather than delivering outgoing mail directly to its various 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

will attempt to send that message directly to that server or the server specified in the

MX record, if it exists. Depending on your network setup, this method of mail transport

may not be desired or even possible. You may then need to relay all outbound

messages through a specific server.

• You may 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 particular

server for relaying mail through the firewall.

• You may find this method 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

or without the relay server’s administrator’s permission. Trying to do so, without the

express authorization of the relay server administrator, will label you as a mail service

abuser.

To relay SMTP mail through another server:

1 In Server Admin, select Mail in the Computers & Services pane.

2 Click Settings.

3 Click the General tab.

4 Click “Relay all SMTP mail through this host” and enter the DNS name or IP address of

the server that provides SMTP relay.

5 Click Save.

Limiting Incoming Message Size

You can set a maximum size for incoming messages. The default is 10 megabytes. You

may not want to allow large attachments which add to the message size.

To set a maximum incoming message size:

1 In Server Admin, select Mail in the Computers & Services pane.

2 Click Settings.

3 Click the Quotas tab.

4 Check “Refuse Incoming Messages... “ and type the number of megabytes you want to

set as the limit.

5 Click Save.

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Apple Mac OS X Server Version 10.4 or Later Manual do Utilizador Página 35