When using the free version, the Mailify signature is automatically displayed at the bottom of your email campaigns.
Once you purchase a pack of credits, you have the possibility to disable it. You can do this from your Settings, which can be found in the Mailify application, when you click on the cog next to your name.
When the window opens, go to General. In this tab, you will see the option to deactivate the signature.
Once deactivated, the Mailify signature will no longer appear on any future campaigns sent.