The ntries equate
shows the number of times delivery was attempted before final
delivery could be achieved for an envelope, or before delivery
couldn't be successfully achieved, resulting in the
message being returned to the sender. When multiple envelopes are
processed from the queue and are destined for the same host, only the
first will be deferred and have its number of attempts incremented.
The others will not be tried because the host is unavailable, and
therefore will not have their number of attempts incremented. Thus,
the ntries equate shows only actual attempts.
Note that the ntries= syslog
equate is shown only for recipient records. Also note that the
ntries= syslog equate will
appear only if the LogLevel option (LogLevel) is set to 10 or above.