-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).
Get sendmail, 4th Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.