Hanging of qmail SMTP

[Md. Sifat Ullah Patwary]

Hi all!

I found my qmail server has been hanging time to time. At hang situatin, it
receives mail from any smtp client but does not delever it to destination.
All mails are queued. I have to restart the machine to get life working.
qmail works nice for 2/3 days and suddenly hangs again. Even if I kill
qmail-send and restart it again (of give kill -ALRM `pidof qmail-send`), it
doesnt work properly.

Any help please?

Sifat.