patch: email is not send on segmented tcp packets from smtp server

[davidl]

All email notifications will not be sent if the answer from the smtp server
is segmented (Message from wireshark: [TCP segment of a reassembled PDU]).

The TCP Stream looks like this:
220 ******************************************HELO xyz.xyz.com
5)
502 5.5.2 Error: command not recognized

The HELO Command is send before the complete "220 ***..." from the server
is received (in my case, the last 4 bytes are missing) and then the server
(MS-Exchange) sends a 502 5.5.2 Error.
A correct communication protocol looks like this:

220 ********************************************
HELO xyz.xyz.com
250 myservice.com
MAIL FROM: <[email protected]>
250 2.1.0 Ok
RCPT TO: <[email protected]>
250 2.1.5 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
From:<[email protected]>
To:<[email protected]>
Date: Tue, 19 Aug 2008 00:42:16 +0200
Subject: Too many processes running on ZABBIX Server: OFF

Too many processes running on ZABBIX Server: OFF
.
250 2.0.0 Ok: queued as 7B77F302835
QUIT
221 2.0.0 Bye

I added a patch which fixes the communication to the smtp server and reads
his messages until the end of line (0x0a) and not only the first
network-packet.
The problem is in 1.4.6 and 1.5.3 and the trunk.

The problem occurs when I switched from one hardware to an other one. And then, there were no email's sent anymore. The problem depends one the hardware (the os was equal on both machines).

Can you fix this?

[urvancevav]

Thanks davidl

I'm surprised.
I wished to offer a similar patch for version 1.6.1 (I received the message "Wrong answer on HELO"). But has detected this patch for version 1.4.6.
Why it has not been included in release 1.6?

P.S. The same problem:

http://www.zabbix.com/forum/showthread.php?t=7280

[woger]

Same problem here too after I changed from provider. It is still not repaired in 1.6.2 . Hope it will be in the next version. Thanks for the patch!

[Andreas Bollhalder]

Count me up for this problem. I'm running 1.6.2 and with this patch, the emails are working again.

Andreas

[NOB]

Hi

me, too.

I took me a lot of time to figure out why the message "Wrong HELO"
was written to the zabbix_server log and showed up in the error
column for the actions
Fortunately, I was able to reduce the output of the first answer
so that I found a workaround.

Thanks for the patch.

Regards

Norbert.

[Andreas Bollhalder]

Is it correct, that this patch still isn't included in the version 1.6.3 ? Or does the version 1.6.3 have it fixed by another approach ?

Andreas

[NOB]

Is it correct, that this patch still isn't included in the version 1.6.3 ? Or does the version 1.6.3 have it fixed by another approach ?

Andreas

Hi Andreas

Fix is not included in 1.6.3.

It should be possible to use the same patch as for 1.4.6.
The last hunk has an offset of two lines, only.
So a decent patch can cope with this difference.

I attached the patch to this article.

HTH,

Norbert.

[Alexei]

Apologies for not looking at the problem earlier. The patch will be integrated into 1.6.x branch soon.

[NOB]

Apologies for not looking at the problem earlier. The patch will be integrated into 1.6.x branch soon.

Hi Alexei

thanks a lot.

The patch in my previous article will work with 1.6.4, too.

Regards

Norbert.

[Andreas Bollhalder]

The patch is working with 1.6.4 too.

Andreas