Delays in queue processing?

[John Hawkes-Reed]

Some of our sodd^wsplendid users have noticed that Mailscanner can
sometimes delay mail. (they noticed a five minute delay, but not the
hour one last week...)

I suspect that what's happening is that if Mailscanner fires off a set
of messages to a sendmail process and some of those have dodgy DNS, it
sits around waiting for the system("sendmail...") call to return. If
this happens to co-incide with a bit of an incoming mail-flood (Sod's
law being what it is), things seem to go rather non-linear.

Is this likely to be what's happening?

--
John Hawkes-Reed