Publish the following DNS TXT record
on mm._domainkey.example.ru subdomain
v=DKIM1;t=s;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDUx8JNRe7+ipJ3aPZxs8SW9zw+B0oBNKRhj6+SGf8KIxE92y2zNEh/TSJd4F0pDSp5wNkVau+GOjd12bPAFw0fVOyyutCylhHfJT7aS2BmHbC3pOFTrsUWBGabUDhu1F0xbpBgTG5bn15CFJ6/NjX/hMkcWqneOBhuE+pc+7gFLwIDAQAB
Private key
You must enter this key in your DKIM signer. It must be kept secret, as anyone with access to it can stamp tokens pretending to be you
Record value:
-----BEGIN RSA PRIVATE KEY-----
MIICXQIBAAKBgQDUx8JNRe7+ipJ3aPZxs8SW9zw+B0oBNKRhj6+SGf8KIxE92y2z
NEh/TSJd4F0pDSp5wNkVau+GOjd12bPAFw0fVOyyutCylhHfJT7aS2BmHbC3pOFT
rsUWBGabUDhu1F0xbpBgTG5bn15CFJ6/NjX/hMkcWqneOBhuE+pc+7gFLwIDAQAB
AoGAXSykHuZSw0+212c1E5EesuTMknTqqSB+IuKihR2xGqVEdYu2tVRdsrD6LZWD
9ef4A5y48rIC9QolIwwTtDfj3FmJqG24Gvz52CwabGGFdkc9tDg8uPoYLHyLQenF
qS4n2QlV1OPNDOHTbPTIGZNU/IZX0Uaq0sOYRg08mRJH2lECQQD65uijNzDlx+l1
xyMFA38r9a0nAy9m+kYtxoHM45ylevJK8sNSTm763TNc2AC/vudQjFfMjT7wiUS/
2mQ53gqDAkEA2RqOfbdv+xIgBcJSkCePNsZ7Wqi7njiwbo+zIeNFy1JwFYyb1qhL
bH+kHcOC99xX4mpoi4GSSZ6Y1rlMLHqK5QJBAKbD48zYWj/gaGRIQBaNBHILkVNk
4pTntM2oK44rm2rCFVmLkhea2lkTvZfwWk8YbFc1cQYcu8DU/EUou4Va+FECQGuf
ZpObo79qtMUmF5euhKg6rFu82YUNxSiJw9tAtxCbxURpd7dppjoa7Fh02y/T4x0y
crD1gndMT6fiI4jJFqECQQCgPxI3VZ3XgoeXnqOFqL0mIBtFiHI9tOLkUbfndWV2
SZ9RV9CAZZrWZVDej28CvEu/jE0yttb1hA6LTkqGLOH9
-----END RSA PRIVATE KEY-----
https://easydmarc.com/tools/dkim-record-generator
domain: example.ru
selector: mm