Custom Fields

Capture your unique business data by storing it in custom fields. They can store things like subscribers’ names, IP addresses, birthdays, number of pets they own, their favorite ice cream flavors, etc. Custom fields help you keep records on everything you want to know about a contact.

Things to know about custom fields in MailExpress:

  • There are 3 types of custom fields: Text, Number, and Date
  • The system has Email, First Name, Last Name, and Source as default fields 
  • Once you have created a custom field, you can only edit its Field Name and Merge Tag, Field Type can no longer be changed
  • Format for Date type custom field: MM/DD/YYYY
  • For the Number type custom field, it allows users to enter any integers, it can be used to store things like customer IDs, tracking numbers, phone numbers, or zip codes
  • Users should be cautious when deleting any existing fields. Once a custom field is deleted, all contacts’ information and segment rules associated with that field will be deleted as well

How To Create New Custom Fields

1. Find the desired email list under -> Lists, we use Email List 1 as an example here.


2. In the list, click -> ...  -> Custom Fields


3. Click -> Add Field to add new custom fields


4. Name the field and Select its Field Type from the drop-down menu, in this example, an IP address consists of numbers and dots, therefore, we use “Text” as its field type.


5. Click Save, IP Address was added as a custom field for Email List 1.


Merge Tags: Merge tags are variables that represent the data values of each contact. You can use them to personalize your emails and increase engagement with your subscribers. For example, if you add “Hi [MERGE_FRIST_NAME]” in an email template and your subscriber’s name is Alice, she will see “Hi Alice” in the email. Merge tags can be customized for your custom fields.

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