DKIM key rotation is widely recommended to minimize the impact of compromised keys by reducing the exposure window and preventing unauthorized use, while also ensuring the key management process is functional and up-to-date. It is considered a proactive email security strategy, ensuring regular security updates and maintenance, as well as standardizing processes. A 2048-bit key length is considered the industry standard for enhanced security, offering better protection against cryptographic attacks and ensuring compliance with email authentication standards. Although strict guidelines for rotation frequency may not exist, rotating keys at least annually or every 6-12 months is considered a good practice. The DKIM standard supports publishing multiple public keys to facilitate seamless key rotation without service interruption. While RSA-512 is considered easily cracked, 2048-bit is currently acceptable although future vulnerabilities are possible.