TL;DR
Permanent submission refusal: a trust relationship with a third-party server is missing for message content access. Configure the relationship before retrying. An infrastructure or policy gap, not routine list hygiene. Do not retry unchanged.
What this code means
Registry pattern X.7.14, carried as code 5.7.14 in enhanced status class 5, replaces the earlier X.7.8 mapping for this condition. The submission server refuses content inspection while the partner-system trust configuration it needs for third-party access remains unset. That missing linkage yields a permanent refusal. The status points to infrastructure trust setup, not list hygiene, invalid recipient addressing, or authentication credentials. The numeric reply does not identify which partner host, which trust parameters, or which operator must correct the gap.
Provider examples
534 5.7.14 Please log in through your web browser and then try again. For more information, go to Can't sign in to your Google Account. - gsmtpTechnical meaning
Submission servers that need a configured trust relationship with a third-party server before accessing message content use X.7.14 for that condition. The pattern replaces the prior use of X.7.8 for the same case; code 5.7.14 applies this detail in class 5.
Delivery status
The leading digit 5 denotes a permanent failure of the current attempt. An unchanged retry will not establish the required trust relationship; the code alone identifies neither the third-party server, the required configuration, nor the owner of the fault.
- Class
- Permanent failure
- Retry
- Do not retry unchanged
- Suppression
- Check the full context
Retry decision
Operational guidance: stop automatic and manual retries of the same unchanged attempt. Consider a new, controlled attempt only after confirming the proper trust relationship or correcting its configuration; check suppression again first.
Suppression decision
Operational guidance: do not automatically suppress the address or domain based on 5.7.14 alone. Inspect the complete response, the systems involved in the attempt, their configuration, and the event history, then make the suppression decision according to the confirmed cause and applicable policy.
Common causes
- The trust relationship required between the submission server and the third-party server for access to the message content was not configured.
Diagnostic steps
- Inspect the raw SMTP response and confirm that the enhanced code is exactly 5.7.14 and that the basic reply is in the 5xx class; retain the complete response text.
- Correlate the response with the attempt time, submission server, and third-party server used to access the content; inspect safe logs and the trust-relationship configuration instead of inferring those details from the code alone.
- Stop unchanged retries; before one controlled attempt, confirm that the required relationship was established or corrected, check suppression again, and compare the result.
Actions by owner
Sender
- Do not manually retry the same attempt; give the administrator the complete response and event time without exposing message content or secrets.
Sender administrator
- Use logs and configuration to identify the submission server, third-party server, and required trust relationship, then coordinate the correction with the owner of the relevant system.
- After a verified correction, check suppression again and make one controlled attempt instead of repeating the unchanged submission.
Recipient administrator
- If you manage a server involved in content access, inspect its logs and trust-relationship configuration for the specified attempt, then correct only a confirmed problem.
Provider
- If you operate the submission server or third-party server, inspect the expected trust relationship and safely identify a confirmed gap or configuration requirement for the administrators; do not trigger automatic suppression from the code alone.
Sources
These sources define what this enhanced status code means, mainly through the IANA registry and related RFCs. When provider examples appear on the page, they come from that provider's published documentation. Follow the links to read the original wording in context.
- SMTP Enhanced Status Codes — IANA registry of enhanced mail system status codes.
- RFC 5248 — A Registry for SMTP Enhanced Mail System Status Codes — Creates and governs the IANA enhanced status code registry.
- RFC 2034 — SMTP Service Extension for Returning Enhanced Error Codes — Defines how SMTP returns enhanced status codes to clients.
- Gmail SMTP errors and codes — Official Gmail Help table of SMTP error messages and status codes.
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