18.11. Configuration file case study
As a case study of how sendmail is configured in the real world, this section reviews the config files for a small but sendmail-savvy company, Sendmail, Inc. Their mail design includes a master mail hub machine for both incoming mail and outgoing mail. All incoming mail is accepted and immediately routed to a set of internal IMAP servers that check each message for viruses before delivering it to a user’s mailbox. The mail hub machine also checks each outgoing message for viruses so that Sendmail, Inc. is never responsible for spreading viruses by email. We look at the clients’ configuration first, then inspect the more complicated master machines.
In the examples, we have modified the originals slightly, ...
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