Create custom variables
Custom variables store additional contact data in a mailing list.
Use them to personalize email campaigns, segment your audience, and tailor automated flows to individual contacts.
Let's talk about how to create a custom variable in a mailing list.
Сreate a custom variable
Go to your mailing list where you want to add a variable and click Create variable.
The maximum number of variables in a mailing list is 50.

Enter a variable name. The maximum number of characters in the variable name is 255.
You can use the following characters in the variable name:
- all Unicode alphabetic characters (regex meta group);
- all numeric characters (regex meta group);
- dots, commas, question marks, and exclamation points;
- single and double quotes;
- hyphens and underscores;
- right slash;
- space.

Select the variable type
The variable type depends on the type of information that needs to be passed in it:
| String |
Stores a text value, such as subscriber name and company name. The maximum number of characters in a |
| Number |
Stores a numeric value, such as a phone number. If a number exceeds 16 characters, rounding is applied. When it reaches 17 characters, the last two digits are rounded. |
| Date |
Stores a numeric value in the calendar date format, such as date of birth and date of registration. To display the |

Select the Subscriber editable checkbox if you want to allow subscribers to edit their data themselves.

Click Add.
Last Updated: 08.02.2024
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