0

I have a server with Exchange 2013. Each message that is sent externally contains the IP and the internal server name. How can I hide this IP and internal name? Because some domains that reject the messages because of this with the following error:

...local>: Helo command rejected: ACCESS DENIED. Your email was rejected because the sending mail server does not identify itself correctly (.local)

It could be probably some send-connector configuration.

Thanks.

1

For reliable mail delivery, among other things, your Exchange server should identify itself to other mail servers with a FQDN (fully qualified domain name) and not with its Active Directory domain name.

Both the forward and reverse DNS records with that FQDN should match the effective public ip-address that will be used when your mail server connects to a remote mail server. (If you're not sure which IP-address that is: send a message from your own Exchange account to ping@tools.mxtoolbox.com which will give you that ip-address and other useful info.)

AFAIK You indeed set the FQDN on the send connector https://docs.microsoft.com/en-us/powershell/module/exchange/mail-flow/set-sendconnector?view=exchange-ps

Set-SendConnector "Contoso.com Send Connector" -Fqdn mail.contoso.com
1
  • Thanks. I was able to send an email successfully with this change of send connector.
    – ldxd
    Jul 31 '18 at 17:47

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.