Introducing custom email headers
This feature is available for accounts on the new Google Cloud infrastructure. Headers are a critical part of an email. In a nutshell, they describe the message content and its behavior: where it’s coming from and where it’s going. The common ones are To, From, Date, and Subject, but headers can be customized to do a great many things: tag emails, track them, or control specific behaviors. Now you can do that in Customer.io!
What’s it look like?When you’re composing your email, you can add or remove a custom header super-easily: You’ll see how many there are with the label next to the heading. You can add up to ten and collapse (or open) them, with the arrow on the right: That’s the quick run-down— we look forward to seeing how you level up your sending with custom headers! A few things we’ve heard before:
- Set the
X-Mailgun-Tagheader, for those using Mailgun’s “Topic” subscription functionality
- Customizing the
X-Entity-Ref-IDto stop Gmail showing emails as a thread
X-Auto-Response-Suppress:OOFto suppress auto-replies from Exchange servers