I have one account on Exchange Server 2013 that only receives internal mail, external mail gets rejected with the following error:

Reporting-MTA: dns;DUB004-OMC1S11.hotmail.com
Received-From-MTA: dns;DUB110-W4
Arrival-Date: Fri, 27 Mar 2015 02:22:32 -0700

Final-Recipient: rfc822;<email>@<Domain>.co.uk
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp;550 5.7.1 Recipient rejected (R4)

The email account appears to have the same settings as the email accounts that accept both internal and external email.

could you please make sure you have configured accepted domain and receive connector properly

Hello,

Could you please verify your SMTP connector authenticaiton settings.

regards

Bobson

Hi AJax,

Is there only one account encounter this issue?

This account cannot receive all the external emails? like gmail.com , outlook.com etc..

If only one account, you can try to delete it and re-create, and then check if any helps.

Best regards,

Hello,

Good Day...

Request you to please follow the below steps

5.7.1	A very common Exchange 2010 NDR, the cause is a permissions problem.  For some reason the sender is not allowed to email this account.
	Perhaps an anonymous user is trying to send mail to a distribution list.
	Alternatively, a user may have a manually created email address that does not match a System Policy.
	Check SMTP Virtual Server Access Tab.  Try checking this box: Allow computers which successfully authenticate to relay.
	Check the outgoing SMTP logs.
	Check: Mailbox <Mailboxname> Properties Mail Flow Settings Message delivery restrictions.
	Try disabling Windows-Integrated-Security.  Instead allow only standard authorization on the SMTP receiver on the Exchange 2010 server.
	Check Attachment filtering on the Edge server.

Also  you can follow the below steps

1. Add the user/aliases affected by this to the User List 
   • Found under Management tab > User Management
2. Change the Unknown Users setting 

• Found under Management > Inbound Filtering > Spam Handling Settings > Unknown Users
  • NOTE: BLOCKED is the recommended option

Cause : When Unknown Users is set to block and the user is not listed in the Control Panel, then email to that user is rejected.

For More Info: http://www.techrid.com/exchange-server-2010/mailflow/exchange-server-mail-flow-troubleshooting-with-list-of-exchange-2010-ndr-codes-2/

Regards,

Praveen

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Hi,

Accordingl to your description, i recommend you to perform below steps.

1. Please check if the firewall opened the 25 port

2. Please Check if enable " annonymous users " on receive connector

3. Please try to use 3rd email client (eggamil,sina,Hotmail..) send email to your email account,  please update the status.

Thanks.

Bobson

Thanks Nico,

It is only one account that we're having problems with. I tried recreating another account but it's the same, accepts only internal emails, it will send to external addresses but not receive, even when the message is replied to.

HI,

I've checked SMTP through MXLookups and I get the following:

No A records exist for _______.co.uk.

DNS Transcript - 1  nsc.nic.uk  156.154.102.3  AUTH  46 ms  Received 1 Referrals , rcode=NAME_ERROR    SOA mname=ns1.nic.uk/rname=hostmaster.nominet.org.uk/serial=1304188753,

Praveen,

I can't find the Management tab under Exhange 2013.