Newsletter Glue has a feature that automatically adds an unsubscribe footer to your emails if you don’t include an unsubscribe link with a merge tag.
Apart from giving your readers a way to opt out of content they are not interested in, this link ensures that your email newsletters comply with anti-spam laws like the CAN-SPAM Act.
However, we have this feature disabled by default because most email service providers already include unsubscribe links in the footer of your newsletter when you send out your campaign. With the feature disabled, you can avoid duplicating the same message and confusing your audience.
If you prefer to use the Newsletter Glue unsubscribe link instead of the one from your email service provider, you can add the filter below to the functions.php file for your website’s theme to enable the feature:
/**
* Enable auto unsub link by default.
*/
function newsletterglue_auto_unsub_link_enable( $bool, $app ) {
return true;
}
add_filter( 'newsletterglue_auto_unsub_link', 'newsletterglue_auto_unsub_link_enable', 10, 2 );