-t
Ignore temporary errors V8.10 and later
Usually it is acceptable for a lookup to fail because
of a temporary failure of a system resource. When
reading from a network database map (such as the DNS
name server) temporary failures (such as server
down) generally cause email to be requeued for a
later try. However, you might sometimes find it
desirable for a database map’s temporary failures to
be ignored. In such cases, you can enable this
-t database
switch. With it set, a temporary error will cause
the mail to be delivered.
Note that failure of a key to be found in a database
map is not a temporary error. Also note that this
switch just determines the outcome of a message. It
does not affect the nature of the returned value. To
affect the return value on temporary failures, use
the -T database
switch (-T on page 890).
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