HBO Max emailed a mysterious "Integration Test" to all subscribers

​Social media was abuzz tonight after thousands of HBO Max subscribers received strange emails titled "Integration Test Email #1."

The email was likely a mistake by an HBO Max developer or marketing person performing some tests on their platform and mistakenly sent out an email to all of the streaming network's subscribers.

There is not much to the email, with it simply having a subject of  "Integration Test Email #1" and a message stating, "This template is used by integration tests only," as shown below.

Integration Test Email #1 email from HBO Max

The email was from HBOMax@mail.hbomax.com, and the mail headers clearly show that the email came from the hostname 'abmail.mail.hbomax.com,' a CNAME for u6146175.wl176.sendgrid.net.

As HBO Max sent the email via Sendgrid, a popular email marketing platform, it was likely a marketing test that was blasted out to all registered HBO Max accounts by mistake.

Even though the email was harmless, recipients on Twitter had a fun time making lighthearted jests about the mistaken HBO Max email blast.

There are two types of developers, those that have sent "Integration Test Email #1", and those that will send "Integration Test Email #1"

As a recipient of the Hawaii missile alert, I felt well prepared to field HBO Max Integration Test Email #1.

The difference between HBO Go and HBO Max is that HBO Max includes every season Integration Test Email #1

BleepingComputer has contacted HBO Max to ask about the email but has not heard back at this time.