Discussion list "too many recipients"


We have a discussion list consisting of four members. It’s an executive committee, a closed list. The executive committee occasionally sends an email to their list, plus ten other recipients. The “other” recipients often have overlap with the discussion list members. For example, Dan is in the discussion list, and someone also copied him: overlap.

When they do this, their posts get held with the error message “too many recipients”. I can work with them to not overlap, in case that’s messing things up, but humans will likely do this again some time.

Does anyone know if the overlap is somehow causing a “too many recipients” error?

Does anyone know how I can adjust/control the number of allowed recipients? Ignoring the overlap, the number of recipients in these posts is not a very big number (14).