550 5.7.1 <email@example.com>... Relaying denied
m.seaman at infracaninophile.co.uk
Tue Sep 11 22:48:34 PDT 2007
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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
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
Kent, CT11 9PW
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