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- The generic sendmail configuration - An Introduction.
-
- The purpose of this distribution is to make sendmail configuration
- as painless as possible, yet still retain the flexibility to support
- numerous differently configured hosts without painful knowledge
- of sendmail semantics. This is accomplished by splitting up the
- sendmail configuration file into 2 different sections - those parts
- which are completely (hah!) independent of site and host, and
- those parts which may be host dependent.
-
- Comments about the implementation.
-
- This implementation defines certain concepts which are worth going
- over. First, this sendmail configuration tries to cast all addresses
- into the form 'user@host.domain', where 'domain' (for the interim)
- indicates what mail network the host resides on. For instance,
- some reasonable domains are UUCP, BITNET, CSNET, and ARPA. For now,
- ARPAnet domains are supported by listing the top-level ARPA administrative
- domains as equivalent to (old-style) ARPA. Domains of the form
- '...FOO.BAR.EDU' are only examined for the right-most, or top-level
- domain. When the rest of the mail world (i.e., BITNET, UUCP, etc.)
- move to domain syntax, this approach will certainly need modification.
-
- The second concept is that of a 'local host'. A 'local host' is a
- host for which mail routing is known (or at least assumed).
- Thus, no knowledge of mail domains is required. An address of
- the form 'user@host' will be assumed to refer to a local host.
-
- Various mail domains are assumed to be gatewayed via local hosts,
- also known as 'relays'. You can specify relays for UUCP, ARPA, and
- BITNET, DECNET and ETHERNET. You can also specify 'no relay' for any
- of these mail networks, in which case you should talk to these networks
- directly. Note that the UUCP relay should be a host which uses pathalias
- to generate paths for non-routed UUCP mail. You can still talk to some
- hosts via direct UUCP, and specify another host as your UUCP relay.
-
- Local explicit routing is supported, but unfortunately at a level
- where knowledge of sendmail address rewriting rules is required
- (or at least recommended).
-