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I'm having problems getting PHP to send mail via Postfix on CentOS Linux 5.6.

I've got Postfix version 2.3.3, which was installed with Yum. I also installed Dovecot as per a tutorial, though I'm not sure whether I need this just to send via SMTP.

When the PHP mail() command runs I get this in /var/log/maillog:

Aug 22 10:30:57 ade1 postfix[5798]: error: to submit mail, use the Postfix sendmail command
Aug 22 10:30:57 ade1 postfix[5798]: fatal: the postfix command is reserved for the superuser

I have Webmin installed, and here's the SMTP settings page: http://dl.dropbox.com/u/618674/_perma/2011-08/webmin-postfix-smtp.png

I entered some config settings changes in /etc/postfix/main.cf as per this tutorial: http://wiki.centos.org/HowTos/postfix

In /etc/php.ini I have this:

sendmail_path = /usr/sbin/postfix -t -i

Anyone got any ideas about this "to submit mail, use the Postfix sendmail command" error?

Would I be better using Sendmail? I was advised that Postfix was simpler!

Cheers :)

Also... (may be related),

chkconfig --level 345 dovecot on

returns this:

failed to make symlink /etc/rc0.d/K74lvm2-monitor: File exists
failed to make symlink /etc/rc1.d/S26lvm2-monitor: File exists
failed to make symlink /etc/rc2.d/S26lvm2-monitor: File exists
failed to make symlink /etc/rc3.d/S26lvm2-monitor: File exists
failed to make symlink /etc/rc4.d/S26lvm2-monitor: File exists
failed to make symlink /etc/rc5.d/S26lvm2-monitor: File exists
failed to make symlink /etc/rc6.d/K74lvm2-monitor: File exists
failed to make symlink /etc/rc0.d/K35dovecot: File exists
failed to make symlink /etc/rc1.d/K35dovecot: File exists
failed to make symlink /etc/rc2.d/K35dovecot: File exists
failed to make symlink /etc/rc3.d/S65dovecot: File exists
failed to make symlink /etc/rc4.d/S65dovecot: File exists
failed to make symlink /etc/rc5.d/S65dovecot: File exists
failed to make symlink /etc/rc6.d/K35dovecot: File exists
failed to make symlink /etc/rc3.d/S65dovecot: File exists
failed to make symlink /etc/rc4.d/S65dovecot: File exists
failed to make symlink /etc/rc5.d/S65dovecot: File exists
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1 Answer

up vote 2 down vote accepted

You're getting confused between Sendmail the software, and /usr/sbin/sendmail the standardised interface for sending mail. Revert your sendmail_path back to it's default value and everything will be fine. Postfix provides a sendmail-compatible wrapper that does the right thing about getting mail into the Postfix system.

And, by the way, no, you don't need Dovecot to send mail via SMTP.

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Legend! Thank you, it's now working perfectly. –  Ade Aug 22 '11 at 11:11
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