It's a reply to messages online, which is what you're using, the person Hass to be logged into groups that I owe you can only view messages online if in not logged in.
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On May 6, 2020, at 6:51 PM, Abbie Taylor <email@example.com> wrote:
I'm not an admin, but I subscribe to several groups.io lists in daily summary mode, and I reply to messages all the time, either privately or to the whole group. Here's what I do.
When I click, in the email, on the link for the message I want to view, I'm taken to a web page that contains the message and all replies. Below the message and each reply, among other things, is a Reply link. When I click on this, it opens two edit fields: one with the subject filled in and the other for the reply. After I type my message, I navigate to the Private button and press it. Then, I navigate back to the Send button and click on it, and that does it. I hope I've been helpful.
Abbie Johnson Taylor, Author https://abbiescorner.wordpress.com