Here's a snippet from the email, which quotes their Brand Guidelines: "You're entitled to say that your website or application is integrated with Slack (we like

Here's a snippet from the email, which quotes their Brand Guidelines: "You're entitled to say that your website or application is integrated with Slack (we like people integrating with Slack!), but please don't use the Slack marks as part of the name of your company, application, product, or service, or in any logo you create."