I plan on PMing a number of site admins regarding the behavior of a particular user on our Discourse forum. I’d also like to add a couple other regular members to the PM to give testimony about the user so it’s clear I’m not the only one who thinks this way of him. In total, I’d hope to include ~5 admins and up to 10 other users. The only issue I think I may run into is a potential limit on how many people can participate in the group PM. The “What do trust levels do” thread doesn’t specify a limit, but with limits on similar features (cc’ing someone @theirname), so I wouldn’t be surprised if there was a limit on how many people I could include in a group PM.
Is there such a limit? If so, what is it (or at least the default setting)?