Проверка DKIM-записи домена

DNS-запись mail._domainkey.alta-step.ru с типом TXT опубликована:
v=DKIM1;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvWZVFGpb9mZHvKMdB4a+ 2GFoK/dCtIPpH3wuAheWmTAqqgJ4nwq9c+2t8MJZAghd4gezLfHWIZwdCSejCg05 AWSrFN4LgI1qqm3bqNEi4CPsEjX9e+xS2jKy4G7kINcn7SOY0uzPPcRfMZhZ6qc0 Myg3NQJJulC+1Qruq20
2yKKhnimyNojqd3GeL7vb5oBsomy+KSV2E2bDrnWU0ZHD 6usPL4sIRcJEyM2Rtfn4KDVnZQ8gAUNJTmjdd+XYcpIxmh89KmpZB2sozfCZuJae isE/Mxzd4hWZe770Qy7n73/gjkATQUFCF+iIPPOb5L6osCoFK3bbcY5gPGN5n3zg 4QIDAQAB