Claude Login Verification Code Not Received: Quick Fixes

Claude.ai uses passwordless authentication, relying on a one-time password (OTP) or "magic link" sent directly to your registered email address. If you are trying to log in and the verification code is not showing up in your inbox, it is usually due to aggressive mail server filters, propagation delays, or temporary rate limits.

Follow this guide to identify why the code is blocked and how to bypass the issue.

Why Claude Login Codes Fail to Arrive

Email verification codes can fail to deliver for several reasons: * Greylisting: Your email provider may temporarily delay emails from unrecognized IP addresses or new senders to prevent spam. * Spam and Promo Filters: Automated system emails are frequently routed away from your main inbox. * Rate Limiting: If you click "Resend" multiple times in rapid succession, Anthropic's security systems may temporarily flag your IP address or email as suspicious, pausing outbound codes for up to several hours.

Steps to Troubleshoot Missing Claude Login Codes

Work through these troubleshooting steps in order to isolate and resolve the delivery issue.

1. Search Your Entire Mailbox:
2. Check your Spam, Junk, Trash, and Promotions folders.
3. Search your email client for the term info@anthropic.com or no-reply@mail.claude.ai.
4. Search specifically for the subject line: "Your Claude login code".

2. Whitelist Anthropic’s Sending Domains: To ensure your email provider does not block incoming messages at the server level, add the following email addresses and domains to your email contacts, safe senders list, or whitelist: * info@anthropic.com * no-reply@mail.claude.ai * *.anthropic.com

3. Avoid the Resend Loop: If you do not get the code within two minutes, do not spam the "Resend code" button. Doing so invalidates the previous code and can trigger a temporary cooling-off block on your account. Wait at least 5 to 10 minutes before requesting a new code.

4. Check Your Sign-In Method: If you originally signed up for Claude using "Continue with Google" or "Continue with Apple", attempting to log in via the manual email field can sometimes lead to delivery conflicts or generate a new, unlinked account. Go back to the login screen and click the dedicated Continue with Google or Continue with Apple button instead.

5. Try an Incognito Window or Different Browser: Occasionally, browser extensions, ad-blockers, or corrupt local storage can interfere with the login script, preventing the dispatch of the email. Open a private/incognito window, go to claude.ai/login, and enter your email address again.

6. Disable VPNs and Proxies: If you are connected to a VPN, your IP address might share a bad reputation score with spam bots, causing Anthropic's firewall to block your login request. Temporarily disable your VPN and try logging in again.

When to Escalate to Anthropic Support

If you have completed all the steps above, waited at least one hour, and still have not received a login code, there may be a system-wide email delivery issue or your email address might be on an internal suppression list.

To resolve this, visit support.anthropic.com. Click the chat icon in the bottom right corner and select "Account Access Issues." Be sure to provide the exact email address you are attempting to log in with and confirm that you have already checked your spam folder and whitelisted their sending domains.