DMARC record keeps breaking by itself

pstretch

Registered
Jul 9, 2018
2
0
1
UK
cPanel Access Level
Website Owner
I have setup a DMARC record for the domain - Removed - and tested it with various online DMARC tools to ensure that its syntax is valid, which all pass okay.

Then, a short time later, the DMARC record is showing as an invalid record in all these tools, even though I've not touched it.

If I then edit and re-save the DMARC record using the Raw editor I can then get it working again, only for it to fail again some time later.

I've been through this loop several times now and I can't get a DMARC record that works for more than a few hours.

Weird.

Can anyone offer any help with this please?
 

cPanelLauren

Technical Support Community Manager
Staff member
Nov 14, 2017
13,271
1,243
313
Houston
Hi @pstretch

How long are you waiting between implementing the DMARC record and testing it? It almost sounds as though there may be propagation issues.

If I then edit and re-save the DMARC record using the Raw editor I can then get it working again, only for it to fail again some time later.
can you show the before edit and after edit version?
 

pstretch

Registered
Jul 9, 2018
2
0
1
UK
cPanel Access Level
Website Owner
That's the strange thing - the before and after records are identical in cPanel.

Last night I tested my domain's DMARC record syntax with several test sites (mxtoolbox, dmarcian, etc) and they all show a syntax fail.

The tests all show DMARC record "v=DMARC1" and nothing else i.e. an incomplete record.

When I look in cPanel Zone Editor I see a full and valid DMARC record as below:

Name: _dmarc.example.com.
TTL: 60
Class: IN
Type: TXT

Record: v=DMARC1;p=quarantine;pct=100;fo=1;rua=mailto:[email protected],mailto:[email protected];ruf=mailto:[email protected]

I selected Edit and then Save in cPanel so the record is updated but not changed.

Ten minutes later the record passes all DMARC syntax tests okay.

This morning all the tests again show DMARC record "v=DMARC1" and nothing else i.e. an incomplete record.

When I check in cPanel Zone Editor the record shows unchanged from the valid record I entered last night. Again, I select Edit and Save so the record is updated but not changed. Ten minutes later the record passes all DMARC syntax tests okay.

I manage another domain on a different host but also using cPanel and that DMARC record has never had any problems.
 
Last edited by a moderator:

cPanelLauren

Technical Support Community Manager
Staff member
Nov 14, 2017
13,271
1,243
313
Houston
Hi @pstretch

Based on what you're saying, though the interface show's the record it stops resolving after a certain amount of time. Your profile indicates you're a website owner which would indicate you don't have root access to the server, in order to understand what's happening with the record I think the best course of action at this point is to address this with your host. I don't think the issue is with the dmarc itself it sounds like it has more to do with some configuration of the server your domain is hosted on.

Thanks!