Inside Linux The following listing shows the contents (Web hosting top)
Inside Linux The following listing shows the contents of the generic linux.mc file used to build the linux.cf file: # This is a generic configuration file for Linux # divert(0)dnl VERSIONID(`$Id: generic-linux.mc,v 8.1 1999/09/24 22:48:05 gshapiro Exp $’) OSTYPE(linux)dnl MAILER(local)dnl MAILER(smtp)dnl You must specify an OSTYPE so that platform-specific items are properly configured, such as the pathname for status files, flags required for the local mailer, and other items. Just be sure it is set to linux. MAILER(…) defines the mailers (delivery agents) you want sendmail to support. The local mailer is always included automatically. You should be aware that the MAILER(…) declarations should occur at the end of the configuration (.mc) file. Additionally, the MAILER(smtp) entry should always precede the MAILER(uucp) entry, if applicable. Table 8.3 lists the MAILER options. Table 8.3. Options for MAILER Option Description local The local and prog mailers. You should always include these, unless you relay mail to another site. smtp The Simple Mail Transfer Protocol (SMTP) mailer. uucp The UNIX-to-UNIX Copy Program mailer. usenet Usenet (network news) delivery. fax Facsimile transmission. pop Post Office Protocol. procmail An interface to procmail. mail11 The DECnet mail11 mailer. Useful only if you have the mail11 program. phquery The phquery program. cyrus The cyrus and cyrusbb mailers. It is truly amazing to see the outcome from the previous build process. Look again at the contents of the linux.mc file, consisting of five instructional lines. The resulting linux.cf file consumes 1,165 lines of text! The following output shows snippets from various sections of the file: # temporary file mode O TempFileMode=0600 # match recipients against GECOS field? #O MatchGECOS=False # maximum hop count #O MaxHopCount=17 # location of help file O HelpFile=/etc/mail/helpfile … # Format of headers # ????????????# H?P?Return-Path: <$g> HReceived: $?sfrom $s $.$?_($?s$|from $.$_) $.$?{auth_type}(authenticated) $.by $j ($v/$Z)$?r with $r$. id $i$?u for $u; $|; $.$b H?D?Resent-Date: $a H?D?Date: $a H?F?Resent-From: $?x$x <$g>$|$g$. H?F?From: $?x$x <$g>$|$g$. H?x?Full-Name: $x # HPosted-Date: $a # H?l?Received-Date: $b H?M?Resent-Message-Id: <$t.$i@$j> H?M?Message-Id: <$t.$i@$j> … # short circuit local delivery so forwarded email works R$=L < @ $=w . > $#local $: @ $1 special local names R$+ < @ $=w . > $#local $: $1 regular local name … page 164
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