How to set a TXT record longer than 255 characters in yandex dns?

Question

Domain Name System

Actually SABZH.
DKIM record generated on its server > 255 characters, Yandex allows, according to the RFC standard, to stick no more than 255 characters into it.
Naturally, I tried 2 entries as it says here - DKIM is not validated.
Tried various perversions with parentheses - result = 0
How is it correct to write a long DKIM?

Answer 1

Apparently, it is impossible to split DKIM records into 2, this is explicitly prohibited in the standard (there must be one record for the selector), you can make one record from several text lines
s._domainkey TXT "abc" "def"
If the interface does not allow this, then you won't do that.
Use a 1024-bit key, this is currently sufficient for DKIM and is guaranteed to cause no problems. Or contact the support with a request to add the ability to add TXT records from several lines.

Answer 2

Why put your DKIM on Yandex? Yandex already provides you with a record from its servers.
Using Yandex because of dns without mail is a dubious undertaking.