To reduce phishing risk, secure sign-in and recovery first, then check for mailbox settings an attacker could use to keep access or hide activity: forwarding, filters, delegation, connected accounts, and app passwords. Keep your provider’s spam and unsafe-link and attachment protections enabled. SPF, DKIM, and DMARC are separate domain-owner controls—not switches for ordinary inbox users.
These settings make an account harder to compromise and abuse, but they cannot guarantee that every phishing message will be caught. The exact options and menu names vary by provider, account type, device, and administrator policy.
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1. Strengthen sign-in and recovery
Turn on your provider’s two-step verification or the strongest supported multi-factor sign-in method. If your provider and devices support passkeys or security keys, consider one; availability varies, so check your account’s options before relying on a particular method.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesKeep the account’s recovery phone number and email address current. Protect the recovery email account too: if someone can access it, they may be able to use it to regain access to your mailbox. Review recent sign-in activity and remove unfamiliar sessions or sign-in methods. Revoke app passwords you do not recognize, particularly after changing your main password.
#1 Best Overall
- POWERFUL SECURITY KEY: The Security Key C NFC is the essential physical passkey for protecting your digital life from phishing attacks. It ensures only you can access your accounts.
- WORKS WITH 1000+ ACCOUNTS: Compatible with Google, Microsoft, and Apple. A single Security Key C NFC secures 100 of your favorite accounts, including email, password managers, and more.
- FAST & CONVENIENT LOGIN: Plug in your Security Key C NFC via USB-C and tap it, or tap it against your phone (NFC) to authenticate. No batteries, no internet connection, and no extra fees required.
- TRUSTED PASSKEY TECHNOLOGY: Uses the latest passkey standards (FIDO2/WebAuthn & FIDO U2F) but does not support One-Time Passwords. For complex needs, check out the YubiKey 5 Series.
- BUILT TO LAST: Made from tough, waterproof, and crush-resistant materials. Manufactured in Sweden and programmed in the USA with the highest security standards.
- Google: Use Security Checkup to review recovery options, 2-Step Verification, and account activity. Google’s guidance is at Gmail security tips.
- Microsoft: Turn on two-step verification, review recent activity, and add alternate recovery information through Microsoft account security. See Help protect your Outlook.com email account.
- Yahoo: Enable two-step verification, keep recovery details current, and check recent activity. See Secure your Yahoo account.
2. Look for mailbox access you did not authorize
A password change is not a substitute for checking what the mailbox can do. An intruder may have added rules or access routes that persist after a password is changed, depending on the provider and account configuration. Review the settings below and remove anything you did not add or no longer need.
Forwarding and filters
Check whether mail is automatically forwarded to another address, and inspect filters or rules that forward, archive, mark as read, or delete messages. A malicious rule can divert sensitive mail or make security alerts harder to notice. In managed Google Workspace, automatic forwarding is an administrator-level control; Google warns that attackers commonly use forwarding for data exfiltration. Administrators should disable it where there is no business need. See Google Workspace security health guidance.
Delegation, connected accounts, and app passwords
Review delegated mailbox access and any connected accounts that let another service retrieve messages. For Gmail, check “Send mail as,” delegated access, and accounts checked through POP. Remove unfamiliar entries. Review app passwords used by older services and revoke those you do not recognize or need.
Rank #2
- POWERFUL SECURITY KEY: The YubiKey 5C NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5C NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5C NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
POP and IMAP
Review the Forwarding and POP/IMAP controls in Gmail, along with any corresponding access settings your provider exposes. Keep only the access you need. For workplace or school accounts, an administrator may control which of these options are available.
3. Keep filtering and content protections active
Do not casually add trusted-sender or domain allowlists. A broad exception can let messages bypass protections that might otherwise flag spoofing or phishing. Google Workspace’s security guidance specifically cautions that approved senders without authentication, approved domains, and IP allowlists can weaken filtering.
For managed Gmail, administrators can enable additional protections for links and external images, attachments, and spoofing or authentication. Google says Gmail already scans messages; extra protections can identify additional threats, but can also produce more warnings or send more messages to spam. Users should heed warnings rather than treating them as an inconvenience to bypass.
Rank #3
- POWERFUL SECURITY KEY: The YubiKey 5 NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5 NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5 NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
In Outlook.com, Microsoft describes yellow safety bars for blocked content and red bars for content considered potentially unsafe. Treat these warnings seriously, especially for unexpected links or attachments. Microsoft’s Outlook.com account-protection guidance also says Microsoft will not ask for your password by email.
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4. Handle suspicious messages without following their instructions
Do not reply to an unexpected email asking for credentials or sensitive personal or financial information, and do not use its link to sign in. Open the service independently using a saved bookmark or a known address. If a message claims to be from someone you know or from an organization, verify unusual requests through a contact route you already trust—not contact details supplied in the message.
Report suspected phishing using your provider’s reporting option. That gives the provider a chance to respond through its filtering systems. Google advises users not to reply to or click links in suspicious messages that ask for personal or financial information; see Avoid and report phishing emails.
Rank #4
- POWERFUL SECURITY KEY: The Security Key NFC is the essential physical passkey for protecting your digital life from phishing attacks. It ensures only you can access your accounts.
- WORKS WITH 1000+ ACCOUNTS: Compatible with Google, Microsoft, and Apple. A single Security Key NFC secures 100 of your favorite accounts, including email, password managers, and more.
- FAST & CONVENIENT LOGIN: Plug in your Security Key NFC via USB-A and tap it, or tap it against your phone (NFC) to authenticate. No batteries, no internet connection, and no extra fees required.
- TRUSTED PASSKEY TECHNOLOGY: Uses the latest passkey standards (FIDO2/WebAuthn & FIDO U2F) but does not support One-Time Passwords. For complex needs, check out the YubiKey 5 Series.
- BUILT TO LAST: Made from tough, waterproof, and crush-resistant materials. Manufactured in Sweden and programmed in the USA with the highest security standards.
5. If you send email from a domain you control, configure authentication
SPF, DKIM, and DMARC are DNS-based controls for a business, organization, or individual that sends mail from a domain they control. They do not change how an ordinary recipient’s inbox handles incoming messages.
- SPF identifies servers authorized to send mail for a domain.
- DKIM lets receiving servers verify a domain-associated signature on a message.
- DMARC tells receiving systems how to handle messages that fail authentication and checks alignment with the visible From domain.
Google’s Gmail sender requirements, which its help page says took effect February 1, 2024, call for all senders to Gmail to configure SPF or DKIM; bulk senders must configure SPF, DKIM, and DMARC. Google recommends all three for stronger protection and delivery. Check the current requirements at Email sender guidelines.
Before changing DNS records, inventory every legitimate service that sends mail for your domain and coordinate the change with whoever manages those systems. Monitor authentication reports and delivery afterward. An incomplete sender list or incorrect DNS configuration can cause legitimate messages to land in spam or be rejected.
Best Value
- Security Key : Protect your online accounts against unauthorized access by using FIDO2 and U2F authentication with T110. It's the world's most protective security key that works with windows, Mac OS, Linux as well as Chrome, Firefox, Edge and many other major browsers.
- Certified with the new FIDO2 standard, T110 provides the benefit of fast login and strong protection against phishing, account takeover as well as many other online attactks.
- Works with : Bank of America, Github, Google, Microsoft, DUO, Twitter, Facebook, Dropbox, Apple, ebay, BINANCE, mor and more.
- Fits USB-A port : Insert the T110 security key into the USB-A port of each service and log in conveniently with one touch
- For the driver download and user guide, please visit TrustKey Solutions Home support page.
What these protections can—and cannot—tell you
Google says Gmail blocks more than 99.9% of spam, phishing attempts, and malware from reaching users, and its Safety Center says it blocks nearly 10 million spam emails every minute. Those are Google’s own product claims; they are not an independent comparison of providers and do not mean that every phishing message will be stopped. The provider support pages described here also do not establish a controlled comparison of phishing-filter effectiveness, so they are not a basis for ranking services.
The practical goal is to reduce both the chance of a successful sign-in and the ways an intruder could retain or misuse access. Keep protections enabled, audit mailbox access and rules, and verify suspicious requests through a separate, trusted route. For readers considering a physical second-step device, a FIDO2 security key is one option where the provider and devices support it; U.S. government guidance on phishing-resistant MFA discusses security keys.
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