MailBluster has Custom Merge Tags that can be used in Leads, Email Subject as well as Email Body.
Now with new custom field functionalities, you can import leads, add/update lead, export leads and view leads with custom fields.
You can go to your Brand > Fields and set your own custom field which you can use in you Email Subject and Body.
Here we added a custom field or merge tag named “Gender”
Merge tags can be applied to Subject of the email campaign
And, Body of the email campaign as well
The more custom merge tags you added from Brand > Fields, the more tags will be added here in Merge tags for example: Gender which was added later.
The sent email received by the subscriber will be like this: