Marketing email without "AD" in the subject line is likely to be filtered as spam. Ensure you have "AD" in your subject line so recipients understand the purpose of your email.QQMail relies on content-based filtering.Email campaigns with low engagement metrics are likely to be filtered as spam. QQMail uses complaints, read rates, delete rates, and other engagement metrics to determine if a subscriber wants to receive email. Send relevant and timely email to subscribers.If you receive SMTP response codes indicating you are exceeding connection and throughput limits, reduce the number of connections, email volume, and increase retry times until the messages are no longer received.The SMTP response codes provide additional information to help you troubleshoot. Monitor QQMail SMTP response codes when encountering delivery issues.QQMail blocks or throttles mail with high complaint levels. Monitor domain performance and sign up with QQMail's complaint feedback loop service.QQMail uses the mailto: list-unsubscribe header to process unsubscribe requests. Implement the list-unsubscribe header in all email.Implement a prominent unsubscribe link in all email with a one-click unsubscribe process and immediately honor all unsubscribe requests.Authenticate all email with SPF, DKIM, and DMARC.Configure all IPs with valid reverse DNS (PTR) records.Ensure you follow QQMail's sending guidelines.Have a list hygiene strategy in place to remove or suppress unknown and unengaged users from your email list.Do not purchase email lists or engage in list harvesting from third-party websites. Use opt-in permission methods for all subscribers.QQMail has a Report and Feedback service for subscriber complaints.ĭeliverability best practices and troubleshooting support The volume of messages allowed by QQMail servers may vary depending on your sending reputation and other factors.Ĭomplaint feedback loop (FBL) application The general throughput guideline for a Chinese mailbox provider is to send no more than 4000 messages per hour for each IP address. QQMail does not disclose connection and throughput limits. Its email service QQMail competes with NetEase as one of the largest email providers in China. Tencent QQ is a leading Chinese instant messaging service and web portal created by Tencent.
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