Both Google and Yahoo have additional requirements for email senders starting from February 2024.
How will the changes affect you?
For detailed explanation, you can refer to the above sender requirements links. To keep things simple, we will only highlight the changes you need to make when sending emails with us. Other specified requirements like adding "List-Unsubscribe" header are already handled by us internally.
Setup SPF and DMARC Authentication
If you are sending 5000 or more emails per day, you need to setup SPF and DMARC authentication. We recommend all email senders regardless of your sending volume to setup SPF and DMARC authentication so you will always stay in compliance with the sender requirements as your customer base grow.