I want to get a mail from 'naver' to owa

Question

(For the sake of explanation, we will assume the domain name is domain.com.)
(My All Servers is configured by the Azure VM)

I installed a Exchange Server2016 and configured get/send connector.

I send a message from 'test1@keyman .com' to 'test2@keyman .com' ---> success

Then, I send a message from my 'naver email' to 'test1@keyman .com'
but I get a mail in naver.com : "550 5.4.4 Sorry, I couldn't find any host by that name"

And I send a message from my 'test1@keyman .com' to my 'naver email'
but I cant get a mail in naver.com

How can i get a mail?
please help me ㅠㅠ...

(I already buy a domain in 'gabia.com' and add MX, CNAME, TXT record for registeration in 'M365 > Setting Domain'
but I didn't buy a ssl certification.)

Answer 1

Hi @gwtest ,

I installed a Exchange Server2016 and configured get/send connector.

By this, do you mean both the test1@keyman .com and test2@keyman .com are hosted on Exchange 2016? If this is the case, I am a little confused about the 'M365 > Setting Domain' you mentioned at the end of the post as from what I know, that should be meant for Microsoft 365. Is it a hybrid environment? Feel free to let me know if I have misunderstood anything here.

I send a message from my 'naver email' to 'test1@keyman .com'
but I get a mail in naver.com : "550 5.4.4 Sorry, I couldn't find any host by that name".

Are you able to send messages from other types of email account, like a personal outlook.com account, to domain.name? If there is no issue with other external domains, chances are that you would need to contact the support naver.com for further confirmation. If it fails to send from other domains as well, then please open Window Command Prompt, run the command below and check if the MX record is configured properly, that is, the public IP address of your mailbox server can be retrieved.

nslookup -type=MX domain.com  

And I send a message from my 'test1@keyman .com' to my 'naver email'
but I cant get a mail in naver.com

How about sending a message from domain.com to another type of external email account?

Normally, in order to send messages to internet, we'll need to create a send connector in the Exchange server. Please refer to official link below and make sure your send connector has been created properly:
Create a Send connector to send mail to the internet

With that confirmed, please have a check via the Queue Viewer in Exchange Toolbox to see if the message is stuck there with any error messages.
It's also suggested to run the get-messagetrackinglog cmdlet below and check if any clues can be found. You may remove all personal information involved and share the output with us for further analysis:

Get-MessageTrackingLog -MessageSubject <subject> -Sender <mailbox address> -Recipients <mailbox address> |select timestamp,EventID, Source,ConnectorID |sort-object Timestamp  

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