I am running FreeBSD 3.3 with a pn0 network card. When I have qmail send
out large amounts of email to a subscriber list (about 100k addresses) I
often get errors in my message log about dropped packets and 'Out of mbuf
clusters'. Qmail then stops sending mail, but I can still telnet in, so the
network is still up. It suggests I increase nmbclusters or maxusers. I
have maxusers set at 64 and nmbclusters at 2048. Qmail is the only thing
running on the server. Do I really need to increase these? Is there a
problem with the pn0 nic driver? Anyone else solve this problem?
Any help is much appreciated.
Ted
