SMTP Permission Denied when sending test emails

[villieb]

Afternoon all...

I hope someone can help...

I rebuilt my Cacti server, I was using Ubuntu now using Centos - the installation was pretty easy.

It's built and working normally apart from one thing... email alerts

I configured my SMTP server within Cacti, when sending a test email, I get a permission denied message, whereas on my previous build I was able to send messages.

From the cacti server, I can successfully telnet to my mail server on port 25 and able to send a message via CLI...

Can anybody help in troubleshooting this please?

Thanks

[villieb]

anyone...?

[villieb]

I found a useful tool called tcpdump, so installed that and set it up so that it would monitor any connection attempts.

Below are the two captures when I tried to send a test email

[root@Cacti-Serv rra]# tcpdump -i eth0 host <IPofMailServ> and port 25
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
^C
0 packets captured
8 packets received by filter
0 packets dropped by kernel


[root@Cacti-Serv etc]# tcpdump -i eth0 port 25
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel

It seems that a connection attempt isn't actually being made...

[villieb]

I managed to figure this out. I disabled SELinux and the test email started working. It is now set to permissive.

[gandalf]

There should be a SELinux setting that allows http to send emails.
R.