Great tutorial! Many thanks.
Charlie Shoemaker
> Subject: Re: Configuration of Sendmail
> > Sir:
> >
> > No offense intended, but I have many things to do, ahead of learning
> > m4. Would it be possible to see the results of your the changes
> > below, in your sendmail.cf file? I, too, have been looking for
> > something like this. I tried the modifications to sendmail.cf and the
> > startup command line suggested in another post on this thread.
> > Great--sendmail queues the message. However, it does a dns lookup
> > before it will accept the message, which triggers diald to bring up
> > the link. (which I'm trying to avoid)
> >
> > Thanks. Again, no offense. I work in the Windows world, with Linux
> > a means to an end -- giving my network clients internet connectivity
> > at a reasonable price. I wish I could be in the Linux world all the
> > time, but that's not possible, yet.
> >
> > Charlie Shoemaker
> >
> > I'm particularly
> >
> >
> >
>
> Sincere appologies. Herewith some more information....
>
> 1.
>
> Using m4 in the context of sendmail is quite simple. If you have a RedHat or simila
>system with sendmail-cf and m4 installed, all yhe m4 config examples and files sit in
>the /usr/lib/sendmail-cf/cf d> m4 sendmail.mc > /etc/sendmail.cf to generate a n
ew sendmail.cf file. sendmail is then restarted with /etc/rc.d/init.t/sendmail
restart to effect the changes.
>
> 2. The output of the m4 file I sent you generates the following changes:
>
> The first bit is standard:
>
> divert(-1)
> include(`../m4/cf.m4')
> define(`confDEF_USER_ID',``8:12'')dnl
> OSTYPE(`linux')dnl
> undefine(`UUCP_RELAY')dnl
> undefine(`BITNET_RELAY')dnl
> FEATURE(redirect)dnl
> FEATURE(always_add_domain)dnl
> FEATURE(use_cw_file)dnl
> FEATURE(local_procmail)dnl
> MAILER(procmail)dnl
> HACK(check_mail3,`hash -a@JUNK /etc/mail/deny')dnl
> HACK(use_ip,`/etc/mail/ip_allow')dnl
> HACK(use_names,`/etc/mail/name_allow')dnl
> HACK(use_relayto,`/etc/mail/relay_allow')dnl
> HACK(check_rcpt4)dnl
> HACK(check_relay3)dnl
>
> If you are a dialup host, it is best to deliver your mail to your local ISP mail
>exchange. This host should always be up and willl not suffer long network delays or
>sendmail delays trying to deliver >
> define(`SMART_HOST',smtp:pp3.shef.ac.uk)dnl
>
> The following bit is from the Sendmail Book and is recommended if you run a local
>network with a local domain. I run an .pnet domain of several machines and this
>rewrite rule causes immediate deliver>
> LOCAL_NET_CONFIG
> R$* < @ $* . > $* $#smtp $@ $2. $: $1 < @ $2. > $3
>
> The following three directives have to do with database driven address re-writing.
>Of these, I use mainly the Userdb system to rewrite local to and from foreign
>addresses. This works for me. You may > The userdb file consists of paired entries of
>the f
orm:
> pdm:mailname [EMAIL PROTECTED]
> pdm:maildrop pdm
> This text file needs to be converted to database format with the makemap utility,
>e.g. makemap type userdb < userdb in the /etc/directory where type is the type of db
>file, e.g. hash, btree, etc.
> These directoves generate the lines:
> Kgenerics btree -o genericstable
> Kvirtuser btree -o virtusertable
> O UserDatabaseSpec=/etc/userdb.db
>
> FEATURE(genericstable,`btree -o genericstable')dnl
> FEATURE(virtusertable,`btree -o virtusertable')dnl
> define(`confUSERDB_SPEC',/etc/userdb.db)
>
>
> The next bit is the stuff that causes mail to queue and not deliver right away.
>First hold all expensive stuff - for me that is all SMTP traffic. This generates a
>line in sendmail.cf like:
> O HoldExpensive=yes
>
> define(`confCON_EXPENSIVE',yes)dnl
>
> Itsnot enough to just specify that exepnsive holds true - you have to add
>"expensive" flags to the mailers concerned, in this case SMTP. This directive adds
>the "e" flag to the dafault flags already > Msmtp, P=[IPC], F=mDFMuXe,
>S=11/31, R=21,
E=\r\n, L=990,
> T=DNS/RFC822/SMTP,
> A=IPC $h
> Mesmtp, P=[IPC], F=mDFMuXae, S=11/31, R=21, E=\r\n, L=990,
> T=DNS/RFC822/SMTP,
> A=IPC $h
> Msmtp8, P=[IPC], F=mDFMuX8e, S=11/31, R=21, E=\r\n, L=990,
> T=DNS/RFC822/SMTP,
> A=IPC $h
> Mrelay, P=[IPC], F=mDFMuXa8e, S=11/31, R=61, E=\r\n, L=2040,
> T=DNS/RFC822/SMTP,
> A=IPC $h
>
> define(`SMTP_MAILER_FLAGS',`e')dnl
> MAILER(smtp)dnl
>
>
> We now have to disable DNS lookups on mail queueing. For this a "service.switch"
>file is needed. The following directive ensbales the folowing line in sendmail.cf:
> O ServiceSwitchFile=/etc/service.switch
> Be sure to have a service.switch file like this in /etc:
> ----
> passwd files nis
> hosts files
> ----
>
> define(`confSERVICE_SWITCH_FILE',/etc/service.switch)dnl
>
>
> Thats all - let me know if you have any more problems.
>
>
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