On 2010-09-02 3:43 PM, Jim Cunning <jcunn...@cunning.ods.org> wrote: > It appears that the default configuration for MAXPERIP (maximum number > of connections to accept from the same IP address) was set to 4. (I > assume it's the default, since I never changed it myself.) Changing the > value to 10 eliminated the Thunderbird problem entirely. I don't know > if some other value between 4 and 10 would work as well. I'm happy with > it as it is now.
I ran into this a long time ago when I first set up our courier server... TB's default form 'Maximum number of server connections to cache is 5: Tools > Account Settings > Server Settings > Advanced So, setting it to 5 would have been enough...