Whitelist

Whitelist is a simple list of email addresses or domains that someone or a provider has decided to trust. When you are on that list your messages are treated as safe and are less likely to land in spam. People might add you to their contacts or mark you as a safe sender. For larger senders it can also mean that a mailbox provider has marked their sending domain as trusted at a system level.

Whitelisting matters because even good email can be caught by filters. When subscribers or inbox providers whitelist you it improves inbox placement and makes your numbers more accurate. It helps your open and click rates reflect real interest instead of spam filter noise. It also protects your sender reputation because trusted senders see fewer complaints and delivery issues.

You earn a place on a whitelist by sending useful and expected messages over time. Ask new subscribers to add your from address to their contacts in your welcome email so their inbox treats you as safe from day one. Keep your from name and address consistent so people recognize you right away. If you send from a dedicated domain and keep complaints low providers are more likely to see you as a trusted sender.