undelivered customer emails with the following reason: Not sent: Blocked by mail filter

AI generated answer (using internal Slack threads):

Based on the conversations, the issue of undelivered customer emails with the reason "Not sent: Blocked by mail filter" in NetSuite can be due to several reasons. One of the main reasons is that the sending rate is too high, often caused by similar email messages being sent too rapidly. This can trigger spam filters and block the emails. One workaround suggested in the threads is to make each email "different" to avoid triggering the spam filter. This can be done by adding a unique identifier to the email subject line, for example, the transaction ID (

${transaction.tranid}

). Another important aspect to consider is the email authentication. It is recommended to set up DomainKeys Identified Mail (DKIM) and Sender Policy Framework (SPF) for your domain in your NetSuite instance. These are email validation systems designed to prevent email spoofing. They allow the receiver to check that an email claimed to have come from a specific domain was indeed authorized by the owner of that domain. If the emails are still being blocked, it's possible that they are being caught in the recipient's spam filters. In this case, the recipient may need to check their mail settings or spam filters. If the issue persists, it might be necessary to reach out to the recipient's tech support to identify if the email is getting caught in filters and how they can let it through. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******