They all appear to be "no-email", and "special notice" subscribers so would have received nothing via email from the group. And none have sent emails to group or owners.
Drew
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On 03/06/18 00:49, J_Catlady wrote:
On Mon, Mar 5, 2018 at 09:26 pm, Shal Farley wrote:
some trigger to coincident first-time posting
Any emails sent by these members, if they are the first emails sent by them, will cause the display name to be set. So if you've had at least that many members post during those 10 minutes, OR send +owner emails, OR respond via email to just about anything coming from your group, it will cause that. It will die down eventually because the display name is only set the first time an email comes in. (Thankfully, Mark changed this from before, when it used to reset each time anybody sent an email.)
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J
