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Home » Kerio User Forums » Kerio Connect » Block if sender's mail domain was not foundin DNS option (Adding another domain to Kerio fails to send)
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TC10284

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Hey guys,

I have Kerio Connect v7 working fine on one domain. I am running Kerio Connect 7 on Mac OSX 10.6.2 Snow Leopard Server.

I have a three public domain names and I will try to give examples
internal.companyone.com is the internal DNS zone and Kerberos/Open Directory realm that is currently setup on my Mac server. I can send emails just fine using regular pop3 and smtp, as well as pop3/s and smtp/s.
I want to add:
companytwo.com
companythree.com

But I am running into a stumbling block with companytwo.com.
When I try to send email from user@companytwo.com[/email][/email][/email] I get an error basically saying: "Protocol: SMTP, Server Response: '553 5.1.8 Sender address <user<_at_>companytwo.com> domain does not exist'. Port: 465, Secure(SSL): Yes, Server Error: 553, Error Number: 0x800CCC78"

If I uncheck the option "Block if sender's mail domain was not found in DNS" under the SMTP server, of course the user can send the email just fine. The problem is that I don't want any user to get creative and make a fake email account of something like user<_at_>test.com.

So I tried adding a Primary Zone in Mac Server Admin under DNS. The primary zone name is companytwo.com. Still failed to send.
I also tried adding a mail exchanger on the Primary Zone. Still failed to send.
I just now tried removing the companytwo.com primary zone and adding a secondary zone of companytwo.com. Still failed to send.
I tried adding an A record for companytwo.com under the internal.companyone.com zone. Still failed to send.

I think part of my issue too, is that I need Open Directory users in internal.companyone.com to be authenticated in companytwo.com. Is this possible?

What's going on and how can I fix this?

[Updated on: Thu, 11 March 2010 04:22]

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freakinvibe

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The option "Block if sender's mail domain was not found in DNS" is used for incoming mail. KMS checks if an MX record for the sender domain exists.

Can you confirm that you have an MX record for companytwo.com officially published to the Internet?

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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TC10284

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This is an nslookup I did at home that is NOT on any of the company domains I listed above.

C:\Users\tavis.TC>nslookup
Default Server: galron.unrelateddomain.com
Address: 192.168.1.2

> set type=mx
> companytwo.com
Server: galron.unrelateddomain.com
Address: 192.168.1.2

Non-authoritative answer:
companytwo.com MX preference = 10, mail exchanger = mail.companytwo.com

mail.companytwo.com internet address = 173.XXX.XXX.153
>

> mail.companytwo.com
Server: galron.unrealateddomain.com
Address: 192.168.1.2

companytwo.com
primary name server = ns01.one.com
responsible mail addr = hostmaster.one.
serial = 2004000000
refresh = 10800 (3 hours)
retry = 1800 (30 mins)
expire = 1209600 (14 days)
default TTL = 900 (15 mins)
>


I added it late last night, shortly before I gave up. The right Internet address above is correct, but when I lookup mail.companytwo.com, I don't think that part is correct. I have hosting on one.com, but I have the Mac server running a DNS/Open Directory/email server.

Currently it still won't send. =(

[Updated on: Thu, 11 March 2010 15:02]

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TC10284

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Here are the Email DNS settings for my hosting provider:

Mail settings
Use One.com Network mail servers

Setup different mail servers (advanced)

Personal mail DNS settings

Domain - Type - Value - Server - Properties
companytwo.com MX 10 mail.companytwo.com


I also have an A record under the regular DNS settings pointing to the static IP 173.XXX.XXX.153 that my modem/router uses that has port forwarding enabled for POP3/S and SMTP/S.

[Updated on: Thu, 11 March 2010 15:11]

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freakinvibe

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You are obfuscating your domains and IP addresses, so it is difficult to help.

Can you send me a PM with your real domain for companytwo.com, if you don't want everybody to know the name. I can then do some tests an lookups to see if it is properly configured.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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TC10284

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I sent you a PM. =)
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