Resolving the Incorrect format. Text string too long error
Written by
Updated at December 17, 2025
Issue description
When entering a text string, you see this error:
Incorrect format. Text string too long
Solution
In TXT records, strings longer than 255 characters are prohibited. According to RFC 4408, a longer SPF or DKIM string is split into several consecutive strings, and the reading side combines them into one. For more details, see this article.
You can split such a long record into two using this YC CLI command:
yc dns zone add-records <...> --record '<name> TXT "v=DKIM1; k=rsa; p=..." "..."'
Such a TXT record will be added successfully.