Website error guide

Is your website showing an error? Find it below: we explain in plain words what it means, what caused it and how to fix it step by step. Right next to it is a tool to check your own site instantly.

SSL and HTTPS

• ERR_CERT_DATE_INVALID ERR_CERT_DATE_INVALID error
• ERR_CERT_AUTHORITY_INVALID ERR_CERT_AUTHORITY_INVALID error
• ERR_CERT_COMMON_NAME_INVALID ERR_CERT_COMMON_NAME_INVALID error
• ERR_SSL_PROTOCOL_ERROR ERR_SSL_PROTOCOL_ERROR error
• NET::ERR_CERT_REVOKED NET::ERR_CERT_REVOKED error
• Mixed Content Mixed content warning

Server errors (HTTP)

• 403 Forbidden 403 Forbidden: Access to This Page Is Denied
• 404 Not Found 404 Error: The Page Could Not Be Found
• 500 Internal Server Error 500 Internal Server Error: Something Broke on the Server
• 502 Bad Gateway 502 Bad Gateway: The Server Got a Bad Response
• 503 Service Unavailable 503 Service Unavailable: The Site Is Temporarily Down
• 504 Gateway Timeout 504 Gateway Timeout: The Server Waited Too Long
• 508 Resource Limit Is Reached 508 Resource Limit Is Reached: Account Limits Hit

DNS and domain

• DNS_PROBE_FINISHED_NXDOMAIN DNS_PROBE_FINISHED_NXDOMAIN error
• ERR_NAME_NOT_RESOLVED ERR_NAME_NOT_RESOLVED error
• DNS_PROBE_FINISHED_NO_INTERNET DNS_PROBE_FINISHED_NO_INTERNET error
• This site can't be reached This site can't be reached
• Домен не резолвиться після зміни NS Domain not resolving after an NS change or migration
• Неправильна A-запис DNS Wrong A record, or www not working

Email and spam

• 550 SPF check failed The 550 SPF check failed error
• Листи потрапляють у спам Emails going to spam
• DMARC policy reject (p=reject) DMARC reject: message blocked by policy
• 550 5.7.1 Message rejected The 550 5.7.1 rejected error
• DKIM signature verification failed DKIM fail: signature does not verify
• No MX record found Missing MX record

Connection and availability

• ERR_CONNECTION_TIMED_OUT ERR_CONNECTION_TIMED_OUT error
• ERR_CONNECTION_REFUSED ERR_CONNECTION_REFUSED error
• ERR_CONNECTION_RESET ERR_CONNECTION_RESET error
• ERR_TOO_MANY_REDIRECTS ERR_TOO_MANY_REDIRECTS error
• Сайт не відкривається Site won't open