[MM3-users] Re: Phantom Email Address in Nonmember List

Thanks and apologies, Mark. I sent the latest post before I went back and read through the earlier exchange on this topic. Had forgotten what you said 16 months ago. The problem seems to be triggered when I post to the list with the stevebrown address, likely due to a mismatch between the way Mailgun constructs headers and the way Mailman3 processes them. The good news is that I now know what "grepping" is. Am I correct that I cannot do that as a mere list manager and not a Mailman3 platform operator with Linux? Also good to know about VERPing. I'm not enough of an IT guy to know the lingo well. Steve