Why do test emails sent via Dryfta show a small image with an 'x' icon?

When sending test emails through Dryfta, an image with an 'x' appears at the bottom of the email. What is this image, and can it be removed?

The small image with an 'x' that appears in emails sent through Dryfta is actually a tracking pixel used to monitor email open rates. This pixel is normally invisible and is embedded in the email to gather analytics on email engagement. However, some email clients display this pixel as a broken or missing image icon (often shown as an 'x'). This behavior is due to the email client itself, and Dryfta cannot disable or remove the tracking pixel from its end. It's a standard part of email tracking and does not affect the content or delivery of your emails.