Is there such a thing as a non-forking MTA?
I'm running a high traffic (3000 users) discussion list. I'm currently using qmail as my MTA (Mail Transfer Agent). My account is limited to 80 concurrent processes. Some of the people on my discussion list have slow mail servers, so it takes a while to deliver to everyone especially when some processes are tied up delivering to slow mail servers.
I'm wondering is there is a non-forking MTA that uses the select() model (like thttpd does) to be able to deliver to a large number of remote mail servers simultaneously. Such an MTA would be able to send out mailing list traffic a lot faster, limited only by the bandwidth of the machine.
