[dmarc-discuss] DMARC and vanity domains

Marc Luescher marc.luescher at webgate.biz
Fri Aug 25 10:22:50 PDT 2017

Hi there,

we are setting up a lot of vanity domains to make sure they can not be used
for abuse.

main domain fresenius.com
vanity 1 fressenius.com etc

My idea was to just to create a DMARC record like :

v=DMARC1; p=reject; rua=mailto:716767a6 at mxtoolbox.dmarc-report.com,
mailto:92ef88808ad6806 at rep.dmarcanalyzer.com,mailto:yjgni57k at ag.dmarcian.com;ruf=mailto:92ef88808ad6806 at for.dmarcanalyzer.com,mailto:yjgni57k at ag.dmarcian.com
; sp=reject; fo=1;

for all newly registered vanity domians and to authorize it in the master
domain. Would this be best practice or do we need for every vanity domain
also a valid SPF and/or DKIM record to be fully compliant. I did not find
any guideline how to do this.

Thank you

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