Mail clients not able to send SMTP mail through Zimbra??

[sparky]

Hi,

I'm using Zimbra 5.0.16 opensource edition and all was working fine until I had a little hickup a few weeks back with some people attempting to use my system as though it was an open relay.

That seems to be all fixed, the only problem however is that now no one that is connected to the server can send emails from it??

I have 2 internal subnets using 192.168.0.0/23 prefix and they included in the Zimbra Postfix main.cf file too under mynetworks along side the loopback address.

I have managed to gain some success in sending SMTP mail through the secure port on the server as I'm in a remote location but internal clients don't have any ability to send either meaning that something's up.

/var/log/maillog doesn't show anything and the MUA, Seamonkey or Thunderbird just claims that the server either can't authenticate or that it isn't an openrelay??

What's going on as all mail servers should be able to relay SMTP mail for registered users?

The system used to ask for a password beforehand but subsequently gave up on the last few attempts. Since it's impossible for a system to alter overnight or change configuration by itself, something seems to have affected it but I can't work out what.

Has anyone experienced something similar to this before or does anybody have a clue as to why this is happening??

All my users currently can't send mail unless they use the webmail AJAX or HTML interface :-(

Regards,

Kaya

[veronica]

What error you get in /var/log/zimbra.log ?

[abhiz]

what error you are getting?

/var/log/zimbra.log

[sparky]

Hi guys,

apologies for the delay I didn't have a computer with me all day as I had some errands to take care of.

I checked my /var/log/zimbra.log and the really odd part is that there are no errors logged at all in the file.

My mail client says that the server doesn't support authentication or isn't an openrelay server if authentication is set to none.

I don't understand any of what's going!!!

Could it be a version bug which I discovered??

[abhiz]

Please update your profile with the Zimbra version you are using

zmcontrol -v

run above command and you will get the zimbra version

[veronica]

Server doesnt allow open relay as you are trying to relay mails. Do the outlook/thunderbird client have "myserver requires authentication" enabled ?

[sparky]

$ zmcontrol -v

shows this:

Release 5.0.16_GA_2921.RHEL5_20090429052155 CentOS5 FOSS edition

Server doesnt allow open relay as you are trying to relay mails. Do the outlook/thunderbird client have "myserver requires authentication" enabled ?

I concur! This is expected behavior for non-authenticated persons.....

The MUA does have required authentication enabled in which it claims that Zimbra doesn't support authentication?

I have tied STARTTLS and none for secure authentication which didn't work.

My username however is in the authentication box, only the system doesn't ask me for a password. When I had the server setup and running initially using Seamonkey on Ubuntu Linux everything was fine and I could connect without any issues. I then rebooted my system into OpenSolaris and attempted Thunderbird which didn't work then booted back in to Ubuntu and tried my working version of Seamonkey which then subsequently stopped working also??

I am totally confused since this is not 'normal' behavior! Ie. there's no reason for the system to just stop working. Unless I performed an update to the system through yum which kicked something out?

Memory looks ok:

free -m
             total       used       free     shared    buffers     cached
Mem:          1518       1426         91          0        159        364
-/+ buffers/cache:        902        615
Swap:         1498          0       1498

CPU is running at mostly idle....

OS is CentOS 5.4. - if that helps any?

[chauvetp]

Have you checked /var/log/maillog? Some of the postfix issues may be logged here instead of /opt/zimbra/log

[sparky]

I have checked everything that I personally can think of.

I did think it might be an iptables issue but then iptables is off and everything else connects....

I am not sure if there is a mechanism somewhere in Zimbra to turn off non secure port based logins which might be my issue but I don't recall doing any of that.