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I'm trying to setup a new help desk program (Kayako), but I'm having problems relaying the mail to our mail server.

Here's the error I'm getting:

sendmail[2371]: NOQUEUE: SYSERR(apache): can not chdir(/var/spool/clientmqueue/): Permission denied

I changed ownership on the clientmqueue folder to smmsp:apache with the same 770 permissions as it normally has, however the error still occurs.

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According to the "bat book" (4th edition, page 168) the recommended permissions for the directory are:

chown smmsp:smmsp clientmqueue
chmod 0770 clientmqueue
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That's what I had them set to originally, but I changed it because of the error I keep getting. I'm assuming the 'Permission denied' error was because Apache didn't have ownership. Turning off SELinux enforcement didn't help, either. – nojak Jul 25 '12 at 23:22
Did you reboot the machine after turning SELinux off? – adamo Jul 26 '12 at 6:08
Here's how someone else solved this sudo setsebool -P httpd_can_sendmail on – adamo Jul 26 '12 at 6:09
Interesting. I'll have to try that tomorrow. Thanks! – nojak Jul 26 '12 at 7:42

Sendmail should be running setgid, otherwise the mail queue would have to be writable by PHP. It sounds like this is not the case on your server.

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Sounds like a major security risk to me. – nojak Jul 26 '12 at 0:12
-rwxr-sr-x. 1 root smmsp 839880 Jun 25 11:31 /usr/sbin/sendmail.sendmail – Michael Hampton Jul 26 '12 at 0:41
@nojak well then, if you know what you're doing then you set it up however you want. – tylerl Jul 26 '12 at 0:52
I was just wondering if there was any other way to get it working. I appreciate the response, but it sounds risky. If you would like to clarify why it's not a potential security risk, or if that's the only way to get it working, that would be much more appreciate than a snide remark. – nojak Jul 26 '12 at 1:58
Unfortunately the suggestion didn't work... Same error. Thanks again for the response, though. Much appreciated. – nojak Jul 26 '12 at 2:04
up vote 0 down vote accepted

So, I ended up starting from scratch, just to make sure I only had the minimal install on there, and that there weren't any conflicting packages.

SELinux was still keeping me from connecting to the external mail server, however.

I would receive warnings like this:

[Warning]: stream_socket_client(): unable to connect to (Permission denied) (Transport/StreamBuffer.php:263)

I found that I needed to allow HTTPD scripts and modules to connect to the network by setting an SELinux boolean for httpd_can_network_connect to on.

I did this by running the following command: setsebool -P httpd_can_network_connect on

If you don't use the -P flag, the change is not saved to the policy file, and will not persist through reboots.

Just thought I'd post this for anyone else that runs into a similar issue. I believe that httpd_can_network_connect not being set to on was causing the sendmail error as well.

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