Constant Contact custom field limitations



Constant Contact has a limitation with their API that only allows a set number of custom fields that are fixed and hard-coded. With mailfloss, we occupy CustomField 1 to 7 with our data. That means any data in these fields will get overwritten by mailfloss data. 

If you currently have data in these fields and do not want this to happen, we advise not using the mailfloss update custom fields feature and choose another action such as unsubscribe or delete.