Sacha El Masry writes: > fatal: dns: fork: Resource temporarily unavailable > lost child: lookup agent exited abnormally > fatal: dns_dispatch_parent: msgbuf_write: Broken pipe > fatal: dns_dispatch_parent: msgbuf_write: Broken pipe
These messages make me wonder if you have a problem with RLIMIT_NPROC being too low. Try giving the _smtpd user a higher limit? If you look at fork(2), that and swap are really the only reasons fork should fail. Just a guess, I don't really know.