Summary
Unclassified soft bounces from Orange.fr in Klaviyo are complex, involving factors ranging from connection-level issues and SMTP errors to Orange.fr's specific policies and Klaviyo's infrastructure. Key causes include connection limits, IP reputation problems leading to rate limiting, temporary server issues (overload, greylisting), and potentially a blocked Klaviyo IP. Experts emphasize obtaining the actual SMTP error codes instead of relying on generic classifications from Klaviyo. Because Klaviyo is a shared IP platform, these problems often require Klaviyo's direct intervention. Best practices include analyzing SMTP error codes, warming up IPs, segmenting email lists, and maintaining good list hygiene. Proper DKIM setup and A/B testing are also important. Direct contact with Orange.fr is generally not recommended; focus on escalating the issue to higher-tier Klaviyo support, emphasizing that the problem occurs at connection time and is likely an IP-based block.
Key findings
- Connection-Level Issues: Many problems occur during the SMTP connection handshake (greeting failure), indicating network or server-level issues rather than content-related ones.
- Reliance on SMTP Codes: Generic bounce classifications from ESPs are insufficient; the actual SMTP error code is essential for proper diagnosis.
- Klaviyo Infrastructure: Problems frequently relate to Klaviyo's shared IP infrastructure and require their direct intervention.
- Orange.fr Policies: Orange.fr has specific policies (connection limits, spam filters) that can trigger soft bounces.
- Shared IP Concerns: The shared nature of Klaviyo's IP environment means deliverability can be impacted by other users, requiring a proactive IP warmup and reputation management
Key considerations
- Obtain SMTP Error Codes: Always request the full SMTP error code from Klaviyo to understand the specific reason for the bounce.
- Escalate to Klaviyo Support: Escalate issues to Klaviyo's higher-tier support, framing the problem as a connection-level or IP-based issue.
- IP Warmup & Segmentation: Implement a strategy for IP warmup and segment your lists to improve sending reputation.
- Check for DKIM Setup: Ensure DKIM is properly configured for your sending domain in Klaviyo.
- Monitor Orange.fr Codes: Consult Orange.fr's postmaster resources and Postmastery for specific error code meanings.
- Avoid Direct Contact with Orange: Unless specifically instructed, refrain from contacting Orange.fr directly, as the resolution primarily depends on Klaviyo.
What email marketers say
12 marketer opinions
Unclassified soft bounces from Orange.fr in Klaviyo can stem from various factors, often related to temporary issues or Orange.fr's specific policies. Common causes include: too many simultaneous SMTP connections, IP reputation issues leading to rate limiting or temporary suspension, server overload, greylisting, and strict spam filters. Resolutions involve: analyzing bounce messages for SMTP error codes, contacting Orange.fr support when IP suspension is suspected, warming up sending IPs, segmenting email lists for targeted campaigns, maintaining good list hygiene, and addressing potential problems with sending practices. Additionally, Klaviyo's shared IP infrastructure can amplify these issues, making proper DKIM setup crucial. Finally, due to potentially misleading ESP bounce classifications, it's important to look directly at the SMTP error code.
Key opinions
- Connection/Reputation: Too many simultaneous connections or IP reputation issues can lead to rate limiting by Orange.fr.
- Orange.fr Policies: Orange.fr has strict spam filters and connection limits, which can cause soft bounces.
- Temporary Issues: Server overload and greylisting can result in temporary rejection errors.
- DKIM Importance: Proper DKIM setup in Klaviyo is crucial due to its shared IP infrastructure.
- Misleading Bounce Classifications: ESPs frequently oversimplify bounce classifications and can be misleading. Analyze SMTP error codes instead of relying on bounce messages alone
Key considerations
- Analyze SMTP Codes: Thoroughly analyze SMTP error codes in bounce messages to identify specific causes.
- Contact Orange.fr Support: Reach out to Orange.fr support if IP suspension is suspected (e.g., OFR_999 error).
- Warm-up IPs: Warm up sending IPs gradually, especially on shared IP addresses like Klaviyo's.
- Segment Lists: Segment email lists to send targeted campaigns and improve engagement.
- List Hygiene: Maintain good list hygiene by removing inactive or problematic addresses.
- Review Sending Practices: Assess sending practices to avoid triggering spam filters or connection limits.
Marketer view
Email marketer from EmailGeek shares that monitoring bounce rates and analyzing bounce reasons is crucial for maintaining healthy email deliverability. High bounce rates can signal potential problems with your sending practices or list quality.
30 Sep 2022 - EmailGeek
Marketer view
Email marketer from Email Geeks refers to Postmastery's page and explains that OFR_999 refers to the IP being suspended for a while, likely based on complaints. Recommends reaching out to Orange if this results in mail getting undelivered.
21 Oct 2021 - Email Geeks
What the experts say
10 expert opinions
Unclassified soft bounces from Orange.fr within Klaviyo are primarily attributed to issues at the connection level rather than content or recipient-related problems. Experts emphasize the need to obtain the actual SMTP error code from Klaviyo, as their initial bounce classifications can be oversimplified and misleading. Common causes revolve around Klaviyo's infrastructure, such as too many connections per IP, a misconfigured EHLO string, overloaded Orange.fr servers, or a blocked Klaviyo IP. As Klaviyo is a shared IP platform, resolving the issue typically falls on their higher-tier support. Correct DKIM setup is also a key component to avoiding deliverability issues. Furthermore, if a 'greeting failure' occurs, it signals a problem before content is transmitted.
Key opinions
- Connection Issue: The problem arises during the connection phase (greeting failure) and is not related to content or recipient.
- Need Real SMTP Code: Klaviyo's bounce classifications are often too simple, need to get the actual SMTP error code.
- Klaviyo's Responsibility: The issue is with Klaviyo's infrastructure and requires their intervention, particularly on shared IPs.
- DKIM Setup: Proper DKIM setup is essential for deliverability within Klaviyo.
- IP Based Block: The underlying cause is often an IP-based block, which requires Klaviyo to resolve.
Key considerations
- Request SMTP Code: Always request the actual SMTP error code from Klaviyo support.
- Escalate to Klaviyo: Escalate the issue to higher-tier Klaviyo support if initial responses are inadequate.
- Check EHLO String: Verify that the EHLO string is correctly configured.
- DKIM Configuration: Ensure that DKIM is properly configured within Klaviyo.
- Avoid Contacting Orange.fr: Do not directly contact Orange.fr; Klaviyo needs to address the issue.
- Shared IP Concerns: Be aware that the shared IP environment in Klaviyo can amplify deliverability problems.
Expert view
Expert from Email Geeks shares the connection problems could be the orange.fr machine is overloaded, or the Klaviyo IP address did something very bad. The issue is not related to the recipient, content, or authentication. It’s before Klaviyo had a chance to tell them anything at all about the mail, not even who it was from.
13 Jul 2023 - Email Geeks
Expert view
Expert from Spam Resource explains the importance of setting up DKIM when using Klaviyo due to the shared nature of their platform. Incomplete or missing authentication could lead to deliverability issues with Orange.fr and other ISPs.
15 Nov 2022 - Spam Resource
What the documentation says
4 technical articles
Documentation from various sources explains that soft bounces indicate temporary delivery issues. Klaviyo identifies reasons like full inboxes or server problems. Twilio SendGrid emphasizes the importance of SMTP error codes for diagnosing failures with Orange.fr. The RFC Editor confirms the SMTP protocol's handling of temporary failures resulting in soft bounces. Orange's documentation highlights specific error codes related to IP suspension or connection limits, stressing their importance for troubleshooting.
Key findings
- Temporary Issues: Soft bounces generally indicate temporary delivery issues.
- SMTP Codes: SMTP error codes provide crucial details about delivery failures.
- Protocol Support: The SMTP protocol includes mechanisms for reporting temporary failures.
- Orange Specifics: Orange provides specific error codes for issues like IP suspension and connection limits.
Key considerations
- Monitor SMTP Codes: Carefully monitor and analyze SMTP error codes.
- Troubleshoot Errors: Use specific error codes to troubleshoot and identify the root cause of the soft bounces.
- Address Temporary Issues: Recognize that some issues are temporary and may resolve themselves.
- Refer to Documentation: Consult documentation from Klaviyo, Twilio SendGrid, Orange, and the RFC Editor for detailed information on error codes and troubleshooting.
Technical article
Documentation from Twilio SendGrid explains that SMTP error codes in bounce messages can provide valuable clues about the reason for delivery failures. Reviewing these codes can help identify specific issues with Orange.fr's servers.
2 Feb 2024 - Twilio SendGrid
Technical article
Documentation from Orange explains that specific error codes indicate reasons such as temporary IP suspension due to complaint rates, or exceeding connection limits. Understanding these codes is important for troubleshooting.
12 Jun 2021 - Orange
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