Fixing the `Incorrect format: expected an integer` error when creating an MX record

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Updated at December 17, 2025

Issue description

When creating an MX record, you get the Incorrect format: expected an integer error.

The Incorrect format: expected an integer error means that when creating an MX record, one of its fields includes text instead of a number.

An MX record consists of two parts:

PREFERENCE: 16-bit integer setting the host priority. A lower the value means higher priority.
EXCHANGE: FQDN of the email processing host in the specified zone. This field value must point to an A or AAAA record.

Alert

In the Value field, you need to specify a number, i.e., record priority, followed by text, e.g., 10 mx.yandex.net..

For more information, see this article.

If the above actions did not help, create a support ticket. When creating it, please attach a screenshot of the record settings.