DMARC with subdomain for email server

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1

Operating system CentOS Linux 6.7
Webmin version 1.760
Virtualmin version 4.18
Authentic Theme

DMARC Fails using mxTools https://mxtoolbox.com/dmarc.aspx
using both the sub domain and domain.

Using Webmin, logged into the web1.xxx-xxxxxxxxts.com server I went to

Webmin > Servers > Bind DNS Server > Down under Existing DNS Zones > Click on xxx-xxxxxxts.com MASTER Type > Now in Edit Master Zone and DMARC is listed > Click on that

and the record form comes up. into that I put the following record
_dmarc TXT (“v-DMARC1;p=none;rua=mailto:xxxxx@xxx-xxxxxxxts.com”)

We have:
xxx-xxxxxxxxts.com —> main domain where DMARC record is set

We are using two servers:
eml1.xxx-xxxxxxxxts.com —> email server
web1.xxx-xxxxxxxxts.com ----> web server

When I go to mxTools and test DMARC for both
xxx-xxxxxxxxts.com
and
eml1.xxx-xxxxxxxxts.com

DMARC does not pass, it fails.
Is this because of confusion about the sub-domain?
Do I have to put a DMARC record into the sub-domain too?

Also See Post
http://www.virtualmin.com/node/25081#comment-157324

I can give the full url if it is ok to do so.

Thank you for any help…

1 Like
2

TPN Solutions Peter Knowles, just advised that because I used Webmin, and had not told Bind DNS to reload the record, so the DMARC record was entered but not loaded.

He suggested I use Virtualmin for that because it is for guys like me and not as complex.

Virtualmin > Domain > Server Configuration > DNS Records

Now I can see our DMARC record passes in Returnpath tool
https://stopemailfraud.returnpath.com/dmarc/

Peter advises that the Dmarc record is not used that much by the other mail servers yet.

Thank you Peter!