On 5/3/23 16:01, Sam Darwin wrote:
Amazon SES is a basic SMTP gateway service. It has fewer features and options than mailgun. Incoming and outgoing mail are handled differently. When emails are sent out from the mailman server, they are proxied through SES. Only verified identities may send mail. Notice the sender says "boost@lists.boost.org", since lists.boost.org is a verified domain that is working, otherwise it would be blocked. Incoming emails go directly to mailman, not through any intermediary. SES is not involved with incoming emails to the mail server. This is the same situation as before. - Are emails being sent out? Almost certainly all the emails are being sent as shown by the mail logs on the mail server, and on SES it says "0.01% bounce rate", which is very good. - Is threading working? checking lists.boost.org, messages are organized into threads. However, it may be that threading is only partially correct. If that is what you are reporting.
The fact that the initial message is not part of the thread now is a relatively recent issue. This is the mailman archive from a year ago: https://lists.boost.org/Archives/boost/2022/04/index.php Threading is fine there. In fact, threading was working correctly as recently as in February 2023: https://lists.boost.org/Archives/boost/2023/02/index.php and has been broken in March: https://lists.boost.org/Archives/boost/2023/03/index.php If the system works (and worked) the way you describe, mailman was able to associate the initial message with the thread before and now it isn't. I suspect, this may have something to do with the headers that are added by SES to the messages it sends to the subscribers.