DMARC Guy wrote to you

What we read is public. Here is why we told you.

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 Québec businesses.

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 message only

That was a one-time note. We will not write again. To be sure you receive nothing more, 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