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help-browser.png  2 Server with 2 different domains [message #153683] Tue, 31 January 2023 16:05 Go to next message
Andrej S. is currently offline  Andrej S.
Messages: 4
Registered: January 2023
Location: B├╝delsdorf


Unfortunately I can't get any further.

I have two mail servers running on the LAN

External communication works without problems (external to internal and back)

Mails from Domain1 to Domain 2
and as well
domain 2 to domain 1

The error comes:

Result: delayed, Status: 5.5.4 Cannot find hostname ""
I would have expected here.

The servers can resolve the names among themselves without any problems.

There must be something in the DNS, but unfortunately I can't get any further.

can someone help me with this?
What other information can I give you about this?

ps. when the 2nd server was still hosted in the WAN today, this problem did not exist.
Re: 2 Server with 2 different domains [message #153739 is a reply to message #153683] Tue, 07 February 2023 02:52 Go to previous messageGo to next message
chrisc is currently offline  chrisc
Messages: 155
Registered: January 2022
Hi Andrej, for assistance in this issue kindly take a moment to submit a request to our Technical Support team!

Chris Contorinis
Customer Care Specialist
GFI Software
Re: 2 Server with 2 different domains [message #153742 is a reply to message #153739] Tue, 07 February 2023 08:19 Go to previous message
Backspin is currently offline  Backspin
Messages: 134
Registered: June 2008
Location: Amsterdam, the Netherland...
Do you have more info on your setup? What OS are the servers running? Are they using a LAN DNS or external DNS? If the are using a LAN DNS, did you setup MX records for both domains in this DNS server?

[Updated on: Tue, 07 February 2023 08:19]

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