> What are the probabilities of the Sendmail server being the one causing
> the problems? What if the mail admin of mg.hk5.outblaze.com has used
> some sort of patch that is causing qmail-remote's to hang? Has anyone
> communicated with outblaze.com's postmaster?
There is nothing a remote system can do that will hang qmail-remote on
a correctly functioning OS. If the local TCP stack has accepted data
and indicated available via the select() return, then the remote
system has no further say as the read() only fetches the data
previously received.
I'll bet it's an OS bug - most likely in the TCP stack. Eg, it may be
that the local TCP stack - in some circumstance - discards unread
data, *then* marks the local socket as unreadable, rather than around
the other way. That sort of window would wedge the select/read
sequence in qmail-remote.
Regards.
