Extended Variables | Blueshift Help Center

When you deisgn your templates, you can use some extended or non-standard variables in your templates. To reference extended variables, simply add extended_variables syntax in your liquid expression.

Preview Email	Use the variable `{{email_preview_link}}` to create an online version of your email template. `<a href="{{email_preview_link}}">Click here to preview</a>`
Unsubscribe	Use the variable `{{unsubscribe_link}}` in your HTML templates. When the email is sent out, the variable link expands to a hyperlink that includes a hash of the user's ID. When the user clicks the link, Blueshift can track the click and unsubscribe the user.
Resubscribe	You may want to send a confirmation email when a user unsubscribes from your mailing list. However, you could also include an option to resubscribe by inserting the variable `{{resubscribe_link}}` in your HTML templates.
Open Tracking Pixel	An open tracking pixel is added to the end of each email body by default. However, accounts can opt-in to position this pixel manually. If this snippet is missing from your template, then the open tracking pixel will be added to the end of the email body automatically. If manual positioning is enabled, the pixel is inserted into the email markup by adding the following snippet. `<img src="{{bsft_open_pixel}}"/>` Note: Contact [email protected] to enable Open tracking pixels for your account.
Skipping Link Tracking	The "bsft-no-track" attribute is specifically used for this purpose You can add this attribute to the relevant links. Adding the attribute removes all blueshift tracking from the specified link. `<a href="https://www.gmail.com" bsft-no-track>email link</a>`