[CentOS] Apache wakes-up inactive Exim

Mon Sep 29 02:01:33 UTC 2014
John R. Dennison <jrd at gerdesas.com>

On Mon, Sep 29, 2014 at 02:52:45AM +0100, Always Learning wrote:
> Sendmail is not present on the server. Exim is the only MTA. Exim awoke,
> forwarded the email then became inactive (not running) again.

He didn't say sendmail the package was present; he said sendmail the

rpm -qvl exim | grep sendmail

Those targets are used by the alternatives system and provide backwards
compatibility with the _industry standard_ of /usr/sbin/sendmail and
/usr/lib/sendmail, which are expected interfaces.

> I was curious how a non-running Exim can be run, solely to forward mail,
> then returned to its inactive state. I assume some system software
> identified the PHP outgoing email, and launched the only MTA installed
> (Exim) just to handle the outgoing email.

exim sends mail by default; nothing needs to be running to do so.

One of the annoying things about believing in free will and individual
responsibility is the difficulty of finding somebody to blame your problems
on.  And when you do find somebody, it's remarkable how often his picture
turns up on your driver's license.

-- P. J. O'Rourke (14 November 1947-), American political satirist,
   Rolling Stone, 30 November 1989
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