Jim,
Is there a way to limit the size of attachment that a member can post
to the group?
There is for photos, sort-of, but not for attachments. That's probably because for photos the limit is expressed in pixel dimensions and photos over the limit can be automatically resized to fit. With file attachments the only options would be to strip them or bounce the message.
Or... force the message to the pending queue and defer the choice of stripping, rejecting, or accepting them to the moderator's case-by-case judgment. So I guess those weren't the only options.
The only objection I can see to implementing this feature would be an argument against the added complexity. But that generally hasn't been stopping Mark from implementing good ideas.
Shal