How to Whitelist an Email Address: Complete Step-by-Step Guide
Learn how to whitelist trusted email addresses in Gmail, Outlook, Yahoo, Apple Mail, Proton and Zoho. Follow our simple instructions to receive important emails without losing them to spam.
Have you ever registered for an online service, requested a password reset, or expected a purchase receipt—only to discover that the email went to your Spam or Junk folder? This can happen even when the sender is genuine. If you are a Centucode customer, subscriber, or referral partner, missing an important message could mean overlooking an account-verification link, product information, a transaction receipt, or a referral notification. This guide explains how to whitelist an email address in Gmail, Outlook/Hotmail, Yahoo Mail, AOL Mail, iCloud/Apple Mail, Proton Mail, and Zoho Mail, on computers and mobile devices. Centucode email example: admin@centucode.com . Use the exact, verified sender address shown in an authentic message from Centucode. Different types of messages may come from different legitimate addresses. Do not trust a message solely because its display name says “Centucode.” What Does It Mean to Whitelist an Email Address? Email whitelisting, also called allowlisting , means telling your email provider that you want to receive messages from a specific sender. Depending on the service, you may add the sender to your contacts, mark a message as Not spam , create a trusted-sender filter, or add the address to a Safe Senders or Allow list. Join our referral, earn as we do. Simply share your referral codes on social media. Sign up now to receive Sign up Bonus. Whitelisting helps reduce incorrect spam classification. However, it does not guarantee inbox delivery : security checks, blocked messages, full mailboxes, sending-server problems, and workplace policies can still interfere. Quick Steps: Help Important Emails Reach Your Inbox Before opening the detailed instructions for your email provider, try these four steps: Search for the missing message. Look in Inbox, Spam/Junk, Promotions, Updates, Other, and Archive or All Mail. Mark it as safe. If the message is in Spam or Junk, select Not spam , Not junk , or Move to Inbox , as your service permits. Save the verified sender. Add the exact email address to your contacts or address book. Create an allow rule where available. Use Gmail's Never send it to Spam filter, Outlook's Safe senders and domains , or another provider's allowlist. You need not disable your email provider's general spam protection. 1. How to Whitelist an Email Address in Gmail Gmail is widely used on computers, Android phones, iPhones, and iPads. The most precise Gmail option—creating a Never send it to Spam filter—is available through Gmail on a computer. Gmail on a computer: create a filter Go to Gmail and sign in. In the search bar, click Show search options (the filter/search-options icon). Enter the verified Centucode email address in the From field, for example, admin@centucode.com . Click Create filter . Select Never send it to Spam . Click Create filter again to save your setting. Gmail on a computer: recover a message from Spam Open Gmail and click More in the left-hand menu if necessary. Open Spam . Select the genuine email. Click Not spam to return it to your inbox. Gmail on Android Open the Gmail app and tap the menu icon. Select Spam . Open the genuine email. Tap the three-dot menu and choose Report not spam . Gmail on iPhone or iPad Open the Gmail app and go to Spam from the menu. Select or touch and hold the legitimate email. Choose More and then Report not spam (menu placement may vary). Add the address to Google Contacts Visit Google Contacts , choose Create contact , enter Centucode as the name and the verified sender address, and click Save . On a phone, use its Contacts app if your contacts sync to the same Google account. For more detail, see Google's official guide to fixing legitimate emails in Spam . 2. How to Whitelist an Email Address in Outlook, Hotmail, and Live Mail Outlook.com, Hotmail, and Live email accounts commonly use Microsoft's Outlook interface. Adding a sender to Safe senders and domains is the key step. Outlook.com or Outlook on the web Sign in to Outlook or your organisation's Outlook webmail. Click the Settings gear icon. Select Mail , then Junk email . Under Senders , open Safe senders and domains . Click Add safe sender . Enter the exact Centucode sending address and select OK , then Save . Classic Outlook on a Windows computer Open Outlook and select a legitimate email from Centucode. On the Home tab, open Junk or Block and choose Never Block Sender , if offered. Alternatively, open Junk E-mail Options > Safe Senders > Add . Enter the verified address and confirm with OK . Outlook mobile app on Android or iPhone Open Outlook and locate the Junk Email folder. Open the genuine Centucode email. Choose Move or Move to Inbox . To add a lasting Safe Senders entry, use Outlook on the web or a supported desktop version. Also check the Other tab if your inbox uses Focused Inbox . Moving mail to Focused can help you see it, but it is not the same as adding the sender to Safe Senders. See Microsoft's Safe Senders instructions . 3. How to Whitelist an Email Address in Yahoo Mail Yahoo Mail lets you correct mistaken spam classifications and save senders to your contacts. Mark an email as Not spam Sign in to Yahoo Mail . In the sidebar, open Spam (under More , if the folder is hidden). Select the legitimate message. Click Not spam . Yahoo moves it back to your inbox. All-Round earning with our Trading robot, Up to 22% discount, ends soon. Add Centucode to Yahoo Contacts Open a genuine Centucode email. Select or hover over the sender's name or email address. Choose Add to contacts , if shown. Save the verified email address under the name Centucode . You can also open Contacts and manually add a new contact. If your Yahoo version provides Settings > More Settings > Filters , you may create a sender-based rule, but remember that a filter cannot rescue a message rejected before delivery. Yahoo Mail in a phone browser Sign in to Yahoo Mail in your mobile browser. Open the sidebar and tap Spam . Select the legitimate email. Tap More > This is not spam . See Yahoo's guide to managing spam and Yahoo's mobile browser instructions . 4. How to Whitelist an Email Address in AOL Mail AOL Mail users can improve the handling of trusted messages by recovering them from Spam, saving the sender, and checking email settings. Sign in to AOL Mail and open the Spam folder. Select a genuine Centucode message and use Not Spam , if shown. Open the message's sender details and add the verified address to your contacts. Save the contact name as Centucode . If necessary, open Settings > More Settings and review Filters and blocked-sender settings. If the AOL mobile interface differs, use AOL Mail in a web browser and follow the equivalent steps. See AOL's official mail settings guide . 5. How to Whitelist an Email Address in iCloud Mail and Apple Mail iCloud Mail is Apple's email service. Apple Mail is an app that can also show Gmail, Outlook, and other accounts. When using a non-iCloud account in Apple Mail, follow that account provider's instructions too. iCloud Mail in a browser Sign in to iCloud Mail . Open the Junk mailbox. Select the genuine message. Choose Mark or More , then Move to Inbox . Save the verified sender in your iCloud Contacts. Apple Mail on a Mac Open the Mail app and select the Junk mailbox. Select the legitimate Centucode email. Click Not Junk or Move to Inbox . Add the sender to the Contacts app. Apple Mail on iPhone or iPad Open Mail and go to Mailboxes . Open Junk for the correct email account. Select the legitimate email. Use Move or Move Message and select Inbox . Add the verified sender address to Contacts . Apple explains how to manage junk mail in iCloud and reduce junk mail in Mail on a Mac . 6. How to Whitelist an Email Address in Proton Mail Proton Mail includes a dedicated Allow list for trusted addresses. Proton Mail on a computer Sign in at Proton Mail . Choose Settings > All settings . Open Proton Mail > Filters > Spam, block, and allow lists . Choose Add address or domain , then Allow . Select Email , enter the verified sender address, and save it. Proton Mail on Android or iPhone Open the Proton Mail app and tap the menu icon. Open Settings > Spam and filters . Tap Add address or domain and choose Allow . Select Email , enter the sender address, and tap Add address . Allow a specific verified address rather than an entire domain unless you have a clear reason to trust all mail from that domain. See Proton's official allowlist guide . 7. How to Whitelist an Email Address in Zoho Mail Zoho Mail provides an Allowed List for senders you want its filters to treat more favourably. Sign in to Zoho Mail on the web. Open Settings > Anti-Spam List . Choose the Email Address section and Allowlist/Blocklist Emails . Under Allowlist , click Add . Enter the verified Centucode email address and press Enter or complete the Add action. Check the Spam folder for earlier messages and mark genuine messages Not spam when appropriate. Zoho also offers a separate Trusted List , which can bypass spam checks. For ordinary customer emails, start with the Allowed List instead of bypassing filtering. See Zoho's anti-spam settings guide . 8. Work, School, and Other Email Accounts Business and school mailboxes may be managed through Google Workspace, Microsoft 365, Zoho Workplace, cPanel webmail, or another provider. Even if you add a sender to your personal contacts, your organisation's security rules may quarantine or reject messages. Search your Inbox, Spam/Junk, Archive, Other, and any available Quarantine folder. Mark legitimate messages Not spam or Not junk . Add the exact, verified sender to your address book or personal safe-sender list. If mail is still missing, ask the IT/email administrator to investigate the quarantine or message-delivery logs. Provide the administrator with the expected sender address, date, approximate time, and your recipient address. Do not share your password or verification code. Administrators should use their organisation's approv…