SPF and DKIM Email Authentication Protocol

[armdrejoan]

1. Introduction
In case you missed this important point in the hustle and bustle, ARC or Certified Receiving Chain will become part of the latest requirements from February 2024.
2. What is ARC
ARC ensures the security of email authentication australia phone number list information as it passes through multiple servers, thus acting as an extra layer of protection.

SPF validates emails against a list of authorized IP addresses. During email relaying, emails go through an intermediate server whose IP address may not be on the sender's SPF list. This can cause unnecessary SPF failures even for legitimate emails.
DKIM adds a digital signature to your emails, encrypted using a public key, to verify the origin and authenticity of the message. To do this, DKIM uses a hash value generated using the email headers and body. However, during email forwarding, additional elements such as custom footers or extended subject lines may be added to the email, thus defeating DKIM.