DMARC Guy wrote to you
What we read is public. Here is why we told you.
Don't take our word for it
Ask an AI you already use. Each button opens it with the question already typed:
Prefer to ask it yourself? Copy the question and paste it into any AI you like:
Is it true that if a company's domain has no DMARC record set to quarantine or reject, anyone can send an email that shows that company's address? And does a missing DMARC record make its real emails more likely to land in spam? Please answer briefly.
Or ask your IT person: they can check your domain's real DMARC record in 30 seconds with a free public tool such as MXToolbox.
What we read
Every domain can publish a setting called DMARC. It is public, like a Yellow Pages listing: it is there so that mail servers know what to do with a message pretending to be you. Every mail server that receives an email in your name reads it. We read it once, the same way, for a number of businesses in Canada and the United States.
What we did not do
We had no access to anything on your side: not your systems, not your mailboxes, not your website. Nothing was touched or tested.
Why we wrote
Depending on your setting, one of two things applies, and our email tells you which:
- someone can still send email that shows your address, because the setting is missing or does not ask mail servers to block it;
- your domain is protected, but the reports go nowhere or likely go unread. If one of your own tools (invoicing, newsletter, website form) is misconfigured, its email can be blocked without you knowing.
The DMARC standard has existed since 2012 to deal with exactly this, and many businesses have never set it up all the way. We preferred to tell you.
One reminder at most
If we don't hear back, I may write once more about the same thing. To receive nothing more from DMARC Guy, LastSpam or Reporter, use the unsubscribe link at the bottom of the email, or simply reply STOP.
Check it yourself, for free
Enter your domain in our free checker: you will see exactly the setting we read.
Questions? Reply to the email; I read every reply myself. — Jean-François Bourdeau, DMARC Guy and LastSpam, Québec