MTA internal domain authentication

[kebold]

Hi everybody,

I'm a new users
I've searched in the forum for an answer to my problem, but I didn't find it. If you think that an old thread can help me, please tell me the link

I have zimbra Network edition on my Sles 10 server.
I Have some problem with authentication.

If from an external machine I try to send an email (by telnet or by a mail client) to a zimbra internal domain, zimbra don't request me the authentication.
If, also from an external machine, I try to send an email to an external email address, zimbra request me to authenticate.

I would like that zimbra ask me to authenticate also if I would like to send an email to an internal zimbra domain address.
How can I do that?

here my MTA server configuration:
Enable authentication: checked
TLS authentication only: disable
Web Mail MTA hostname: myhostname
web mail mta port: 25
Relay MTA for external delivery: the ip of the external mail server (in this case is a Mailscanner)
MTA trusted networks: 127.0.0.0/8 myserversubnet

I'm sorry for my english.
Thanks for yours help

Regards

[fulltears]

I also have this question.
MTA trusted networks: 127.0.0.0/8 mta's IP/32
I find that I can send internal mail successfully without password through client like Outlook Express at external lan. I worried about the security issue, I hope it has been resolved and any tips would be greatly appreciate.

[phoenix]

Originally Posted by fulltears

I also have this question.
MTA trusted networks: 127.0.0.0/8 mta's IP/32
I find that I can send internal mail successfully without password through client like Outlook Express at external lan. I worried about the security issue,...

What security issue would that be, don't you trust your users?

Originally Posted by fulltears

I hope it has been resolved and any tips would be greatly appreciate.

Did you try some of the solutions in the forums?

[fulltears]

I trust my users but some hackers.
Actually the question was proposed by our users. If someone can use anybody's email to ask for something, people can't distinguish the truth. I think password auth is very important.

I followed some steps from the thread "ZIMBRA SMTP AUTH problem " , but there are some error and the mta can't work, I still try and hope to find more details.
Anyway, thanks for your reply