With Customer.io, you can manage complex lists and segments, create thoughtful automated campaigns using your data, and build your emails using an intuitive drag-and-drop WYSIWYG editor.
![](https://craft-assets.postmarkapp.com/blog/dnd-split-row.gif)
Plug in Postmark as your email delivery service and you've got a powerful email marketing toolkit that every data-driven marketer will love. Integrating the two tools is a piece of cake: simply grab your SMTP tokens from your Postmark account and tell Customer.io to use this SMTP service for all email sending and you're ready to send.
![](https://craft-assets.postmarkapp.com/blog/_610x343_crop_center-center_10_none/smtp_settings_postmark_creds.png)