Huge amount of scripted emails failing to deliver all of a sudden. Several hundred recipients, many different senders. Reason: “Persistent Transient Failure: Delivery not authorized, message refused”. No script changes made recently.

AI generated answer (using internal Slack threads):

The error message "Persistent Transient Failure: Delivery not authorized, message refused" indicates that the email server is refusing to accept the emails. This could be due to a variety of reasons, such as the server identifying the emails as potential spam or the server not accepting network messages. Here are a few potential solutions based on the conversations: 1. Spam Filter: The email server might be blocking the emails due to a spam filter. This can sometimes be intermittent, allowing a certain number of emails to be sent within a specific time window. One workaround mentioned in the conversations is to tag the email with the "request read receipt" preference, which seemed to resolve the issue in most cases. 2. Unique Subject Line: Ensure that each email has a unique subject line. If the server sees multiple identical emails, it might block them as potential spam. This is especially important if you're using the standard email send method in NetSuite, as opposed to the bulk method. 3. DKIM Setup: Check if DomainKeys Identified Mail (DKIM) is set up and properly tested in Email Preferences. DKIM is an email authentication method that can help prevent email spoofing. 4. Email Preferences: Check your email preferences in NetSuite. Make sure that the test email address is added in Email preferences > Sandbox and Release Preview after the last refresh. Remember, these are potential solutions based on the conversations and might not necessarily resolve your issue. You might need to investigate further depending on your specific situation. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******