SPF alignment

SPF alignment ensures that the IP address sending an email is authorized to send on behalf of the domain in the "From" address.

• Strict Alignment: The exact domain in the Return-Path must match the domain in the From address.
• Relaxed Alignment: The domain in the Return-Path only needs to be in the same organizational domain as the From address. For example, mail.example.com would align with example.com in relaxed mode.

DKIM alignment

DKIM alignment ensures that an email message was not altered in transit and verifies the identity of the sending domain using cryptographic signatures.

• Strict Alignment: The domain in the "d=" tag must match exactly with the domain in the From address.
• Relaxed Alignment: The domain in the "d=" tag only needs to be in the same organizational domain as the From address. For example, mail.example.com would align with example.com in relaxed mode.