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johan Hartono wrote:
 
> Yes, it is a very interesting topic I'd like to
> discuss next.
> I don't know why, in FreeBSD, even though you install
> postfix it will
> appears as sendmail. Will this become any problem?

All of the available MTAs will do that, because the standard Unix API
for an application to send e-mail is for that app to pipe the message
into the STDIN of /usr/sbin/sendmail.  Alternative MTAs have always
therefore provided a high degree of sendmail compatibility and expect
to have binaries either installed as or linked to /usr/sbin/sendmail.

Unlike most other Unix or unix-oid systems, FreeBSD has a slightly
more sophisticated variation on this.  /usr/sbin/sendmail is actually
a wrapper program and not Sendmail Brand sendmail(tm) at all -- see
mailwrapper(8) for details.  Simply by editing the configuration file
/etc/mail/mailer.conf you can switch between sendmail-from-the-base-system, 
sendmail-from-ports, exim, postfix, qmail, ssmtp and probably half a
dozen others.  mailer.conf also covers a number of other sendmail
related commands like newaliases(1) and hoststat(8).

The sendmail binary provided by the base system is installed as
/usr/libexec/sendmail/sendmail

        Cheers,

        Matthew

- -- 
Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
                                                  Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey     Ramsgate
                                                  Kent, CT11 9PW
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