A sending domain for the Security Foundations email configuration test

Why did a message come from here?

Someone at your organization started the Security Foundations email configuration test. It sends a short series of messages to their mailbox and asks them to type back a code from each one, so we can see which messages reached them.

Two of those messages come from this domain:

• “Your Security Foundations test code” — confirms that our messages can reach the mailbox at all.
• “Quick request” — carries a display name that does not match its address. It is a harmless imitation of a common phishing trick, checking whether your mail system flags it.

Neither message contains links or attachments, and neither asks for anything except the code.

Why such a silly name?

On purpose. A test message that ends up in front of someone else — an IT provider, a security team — should be recognisable as a test at a glance, not mistaken for a real attack.

Is mail from this domain genuine?

Everything we send from here is signed and fully authenticated. The domain also tells mail systems to reject anything that claims to come from it and cannot prove it.