I'm seeing connections to port 25 on the local host hanging when qrunner tries to do its thing. Doing a syscall trace of qrunner reveals that after it has written the message to sendmail, it gets:

9182 python RET sendto 16384/0x4000 9182 python CALL read(0x9,0xde000,0x4000) 9182 python RET read -1 errno 35 Resource temporarily unavailable 9182 python CALL gettimeofday(0xdfbfc694,0) 9182 python RET gettimeofday 0 9182 python CALL poll(0x61000,0x1,0) 9182 python RET poll 0 9182 python CALL gettimeofday(0xdfbfc624,0) 9182 python RET gettimeofday 0 9182 python CALL poll(0x61000,0x2,0xffffffff)

At this opint things hang indefinately. Now, the EAGAIN it gets from read(2) is a bit fishy. The sendmail process does still exist at this point:

root 24536 0.0 1.9 776 1204 ?? I 2:50PM 0:00.04 sendmail: server localhost [127.0.0.1] child wait (sendmail)

For the time being I've switched to using Sendmail instead of SMTPDirect as the delivery module. This is sendmail 8.10.1 BTW.

• todd