Yandex troubleshooting support
- Make sure you follow sending best practices when sending to Yandex.
- Review your SMTP log files for error codes regarding the delivery issues experienced.
- Ensure all of your IP addresses are signed up with the Universal Feedback Loop (uFBL).
- Yandex heavily redacts personal identifiable information from complaint messages sent back to you through the feedback loop, so it can't be used to suppress individual subscribers that complain.
- You can use the complaint information, along with their sender statistics program, to identify complaint trends with your email program. Look at possible complaint factors related to consent, send frequency, date and time, and list segmentation.
- Scan your hosting and sending systems to ensure you are not sending viruses or malware to Yandex users.
- Run your content through Inbox Preview to help identify HTML errors and to ensure your content renders properly in both desktop and mobile email clients. Design elements and wording in your content that are similar to known spam messages influences the Yandex spam filter. You want to be sure your content is designed with engagement in mind.
- Ensure Sender Policy Framework (SPF); DomainKeys Identified Mail (DKIM); and Domain-based Authentication, Reporting and Conformance (DMARC) are all passing verification and working properly. Check the Authentication-Results: headers for both Yandex and Gmail and look for spf=pass, dkim=pass and dmarc=pass. If you don’t see “pass”, you need to troubleshoot and fix the cause of the failed verification. Also check multiple campaigns to ensure that any failed verification was not a one-time event.
- For SPF, ensure you are using ~all or -all in the DNS record. Records using +all will likely be placed in the spam folder.
- Check if your IP address is listed on the following blocklists. Investigate and fix any issues if your IP addresses are listed.
- Spamhaus: Spamhaus will give you further direction if your IP address is listed.
- RPBL lookup
