+You can have your host masquerade as another using
+
+ MASQUERADE_AS(host.domain)
+
+This causes outgoing SMTP mail to be labelled as coming from the
+indicated domain, rather than $j. One normally masquerades as one
+of your own subdomains (for example, it's unlikely that I would
+choose to masquerade as an MIT site).
+
+there are always users that need to be "exposed" -- that is, their
+internal site name should be displayed instead of the masquerade name.
+Root is an example. You can add users to this list using
+
+ EXPOSED_USER(usernames)
+
+This adds users to class E; you could also use something like
+
+ FE/etc/sendmail.cE
+
+You can also arrange to relay all unqualified names (that is, names
+without @host) to a relay host. For example, if you have a central
+email server, you might relay to that host so that users don't have
+to have .forward files or aliases. You can do this using
+
+ define(`LOCAL_RELAY', mailer:hostname)
+
+The ``mailer:'' can be omitted, in which case the mailer defaults to
+"smtp". There are some user names that you don't want relayed, perhaps
+because of local aliases. A common example is root, which may be
+locally aliased. You can add entries to this list using
+
+ LOCAL_USER(usernames)
+
+This adds users to class L; you could also use something like
+
+ FL/etc/sendmail.cL
+
+If you want all mail sent to a centralized hub, as for a shared
+/var/spool/mail scheme, use
+
+ define(`MAIL_HUB', mailer:hostname)
+
+Again, ``mailer:'' defaults to "smtp". If you define both LOCAL_RELAY
+and MAIL_HUB, unqualified names and names in class L will be sent to
+the LOCAL_RELAY and other local names will be sent to MAIL_HUB. For
+example, if are on machine mastodon.CS.Berkeley.EDU, the following
+combinations of settings will have the indicated effects:
+
+email sent to.... eric eric@mastodon.CS.Berkeley.EDU
+
+LOCAL_RELAY set to mail.CS.Berkeley.EDU (delivered locally)
+mail.CS.Berkeley.EDU
+
+MAIL_HUB set to mammoth.CS.Berkeley.EDU mammoth.CS.Berkeley.EDU
+mammoth.CS.Berkeley.EDU
+
+Both LOCAL_RELAY and mail.CS.Berkeley.EDU mammoth.CS.Berkeley.EDU
+MAIL_HUB set as above
+
+
++-------------------------------+
+| NON-SMTP BASED CONFIGURATIONS |
++-------------------------------+
+
+These configuration files are designed primarily for use by SMTP-based
+sites. I don't pretend that they are well tuned for UUCP-only or
+UUCP-primarily nodes (the latter is defined as a small local net
+connected to the rest of the world via UUCP). However, there is one
+hook to handle some special cases.
+
+You can define a ``smart host'' that understands a richer address syntax
+using:
+
+ define(`SMART_HOST', mailer:hostname)
+
+In this case, the ``mailer:'' defaults to "suucp". Any messages that
+can't be handled using the usual UUCP rules are passed to this host.
+
+If you are on a local SMTP-based net that connects to the outside
+world via UUCP, you can use LOCAL_NET_CONFIG to add appropriate rules.
+For example:
+
+ define(`SMART_HOST', suucp:uunet)
+ LOCAL_NET_CONFIG
+ R$* < @ $* .$m > $* $#smtp $@ $2.$m $: $1 < @ $2.$m > $3
+
+This will cause all names that end in your domain name ($m) via
+SMTP; anything else will be sent via suucp (smart UUCP) to uunet.
+
+
++--------------------------------+
+| TWEAKING CONFIGURATION OPTIONS |
++--------------------------------+
+
+There are a large number of configuration options that don't normally
+need to be changed. However, if you feel you need to tweak them, you
+can define the following M4 variables. This list is shown in four
+columns: the name you define, the default value for that definition,
+the option or macro that is affected (either Ox for an option or Dx
+for a macro), and a brief description. Greater detail of the semantics
+can be found in the Installation and Operations Guide.
+
+M4 Variable Name Default Mac/Opt Description
+confMAILER_NAME MAILER-DAEMON Dn The sender name used for
+ internally generated
+ outgoing messages.
+confFROM_LINE From $?<$<$|$g$. $d The From_ line used when
+ Dl sending to files or programs.
+confFROM_HEADER $?x$x <$g>$|$g$. The format of an internally
+ Dq generated From: address.
+confOPERATORS .:%@!^/[] Do Address operator characters.
+confSTMP_LOGIN_MSG $j Sendmail $v/$Z ready at $b
+ De The initial (spontaneous)
+ SMTP greeting message.
+confEIGHT_BIT_INPUT False O8 Use 8-bit input?
+confALIAS_WAIT 10 Oa Wait (in minutes) for alias
+ file rebuild.
+confMIN_FREE_BLOCKS 4 Ob Minimum number of free blocks
+ on queue filesystem to accept
+ SMTP mail.
+confBLANK_SUB . OB Blank (space) substitution
+ character.
+confCON_EXPENSIVE False Oc Connect immediately to
+ mailers marked expensive?
+confCHECKPOINT_INTERVAL 10 OC Checkpoint queue files
+ every N recipients.
+confDELIVERY_MODE background Od Default delivery mode.
+confAUTO_REBUILD False OD Automatically rebuild
+ alias file if needed.
+confERROR_MODE (undefined) Oe Error message mode.
+confERROR_MESSAGE (undefined) OE Error message header/file.
+confSAVE_FROM_LINES False Of Save extra leading
+ From_ lines.
+confTEMP_FILE_MODE 0600 OF Temporary file mode.
+confDEF_GROUP_ID 1 Og Default group id.
+confMATCH_GECOS False OG Match GECOS field.
+confMAX_HOP 17 Oh Maximum hop count.
+confIGNORE_DOTS False Oi Ignore dot as terminator
+ for incoming messages?
+confBIND_OPTS (empty) OI Default options for BIND.
+confMCI_CACHE_SIZE 2 Ok Size of open connection cache.
+confMCI_CACHE_TIMEOUT 5m OK Open connection cache timeout.
+confLOG_LEVEL 9 OL Log level.
+confME_TOO False Om Include sender in group
+ expansions.
+confCHECK_ALIASES True On Check RHS of aliases when
+ running newaliases.
+confOLD_STYLE_HEADERS True Oo Assume that headers without
+ special chars are old style.
+confPRIVACY_FLAGS public Op Privacy flags.
+confCOPY_ERRORS_TO (undefined) OP Address for additional copies
+ of all error messages.
+confQUEUE_FACTOR (undefined) Oq Slope of queue-only function
+confREAD_TIMEOUT (undefined) Or SMTP read timeouts.
+confSAFE_QUEUE True Os Commit all messages to disk
+ before forking.
+confMESSAGE_TIMEOUT 3d OT Timeout for messages before
+ sending error message.
+confTIME_ZONE USE_SYSTEM Oz Time zone info -- can be
+ USE_SYSTEM to use the system's
+ idea, USE_TZ to use the user's
+ TZ envariable, or something
+ else to force that value.
+confDEF_USER_ID 1 Ou Default user id.
+confNO_WILDCARD_MX False Ow No wildcard MX records matches
+ our domain.
+confQUEUE_LA 8 Ox Load average at which queue-only
+ function kicks in.
+confREFUSE_LA 12 OX Load average at which incoming
+ SMTP connections are refused.
+confSEPARATE_PROC False Oy Run all deliveries in a
+ separate process.
+confWORK_RECIPIENT_FACTOR
+ (undefined) OY Cost of each recipient.
+confWORK_CLASS_FACTOR (undefined) Oz Priority multiplier for class.
+confWORK_TIME_FACTOR (undefined) OZ Cost of each delivery attempt.
+
+
++-----------+
+| HIERARCHY |
++-----------+
projects / unix-history / blobdiff