How to configure Microsoft Exchange in cPanel

[esultanzada]

Hello,

I want to use Microsoft Exchange Mail service to a subdomain instead of cpanel exim mail server. I configured all dns and mx entries, but when try to send email from subdomain that pointed to Microsoft Exchange to rootdomain.com rejected and receive the following error:

our message to [email protected] couldn't be delivered.

A security check at rootdomain.com failed due to misconfigured settings at subdomain.rootdomain.com.

subdomain.rootdomain.com Office 365 rootdomain.com Action Required Recipient Misconfigured PTR record

How to Fix It The recipient's email server at rootdomain.com performed a security check against your message and the check failed. To fix this, forward this non-delivery report (NDR) to your email admin.

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More Info for Email Admins

Status code: 550 5.7.363 It appears that the recipient's email server at rootdomain.com performed a reverse DNS (rDNS) lookup security check to verify that the IP address the message is coming from is associated with the sending domain, and the lookup failed. It appears that the pointer (PTR) record for subdomain.rootdomain.com isn't set up correctly. Set up or fix your domain's PTR record - If you're the admin for subdomain.rootdomain.com, work with your DNS hosting provider (your domain registrar, Web hosting provider, or ISP) to correctly set up a PTR record for your domain. If you're using Office 365 to manage your DNS records note that PTR record creation and management isn't supported in Office 365, so you'll have to change your DNS management to a DNS host outside Office 365. Refer to this article for more information and instructions: Change how DNS records are managed with Office 365. Unfortunately, Office 365 Support can't help you fix these kinds of externally reported errors because Office 365 doesn't support PTR record management.

Original Message Details

Created Date: 10/18/2019 4:12:54 PM Sender Address: [email protected] Recipient Address: [email protected]

 

[cPanelLauren]

This just indicates that the PTR is not configured correctly, if you've not configured this, in most cases the hosting provider will need to add the record for you which should resolve to the hostname of the server.

 

[esultanzada]

I added PTR as here explained: WHM Video Tutorials- How to Configure Reverse DNS for IPv4 (v76 and later)

But still when try to send email receive same error?!

This just indicates that the PTR is not configured correctly, if you've not configured this, in most cases the hosting provider will need to add the record for you which should resolve to the hostname of the server.

 

[cPanelLauren]

Hello,

But if your provider doesn't delegate access for you to add this record, adding it is going to make absolutely no difference.