domainSigningPrivateKey
[Bring Your Own DKIM] A private key that's used to generate a DKIM signature.
The private key must use 1024 or 2048-bit RSA encryption, and must be encoded using base64 encoding.
[Bring Your Own DKIM] A private key that's used to generate a DKIM signature.
The private key must use 1024 or 2048-bit RSA encryption, and must be encoded using base64 encoding.