Книга: Fedora™ Unleashed, 2008 edition

Using Smart Hosts

Using Smart Hosts

If you do not have a full-time connection to the Internet, you probably want to have Sendmail send your messages to your ISP's mail server and let it handle delivery for you. Without a full-time Internet connection, you could find it difficult to deliver messages to some locations (such as some underdeveloped areas of the world where email services are unreliable and sporadic). In those situations, you can configure Sendmail to function as a smart host by passing email on to another sender rather than attempting to deliver the email directly. You can use a line such as the following in the sendmail.mc file to enable a smart host:

define(`SMART_HOST', `smtp.samplenet.org')

This line causes Sendmail to pass any mail it receives to the server smtp.samplenet.org rather than attempt to deliver it directly. Smart hosting will not work for you if your ISP, like many others, blocks any mail relaying. Some ISPs block relaying because it is frequently used to disseminate spam.

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