On 2023-01-13, Peter Humphrey wrote: > Hello list, > > Ever since the new year I've been getting a bounce message from this list - > 19 > of them so far. The first of those listed one message twice, most of the > others > six times. The message was 200359. > > I don't know what that message was, but why is the system Out There having > such a hard time with it?
Was the message from the list software or from a Microsoft system? There's possibly one subscriber that has configured their Exchange/Outlook account to forward e-mails to a Gmail account, and forwarding as implemented by Microsoft apparently isn't done correctly and so "SPF" checks run by Gmail are failing. I tried to send a message to this list about this topic back in November but it never made through, perhaps it was filtered because it quoted some of the error messages. -- Nuno Silva
