4.4 on page 110).
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1102 | Chapter 24: The O (Options) Configuration Command
24.9.119.7 Timeout.datafinal (V8.6 and later)
After the entire mail message has been transmitted, the local sendmail sends a lone dot to
say that it is done, and then waits for the receiving sendmail to acknowledge acceptance of
that dot:
250 Mail accepted
The amount of time that the local sendmail waits for acknowledgment that the mail
message was received is set with the datafinal keyword, the forms of which are as follows:
O Timeout.datafinal=timeout ?†? configuration file (V8.6 and later)
-OTimeout.datafinal=timeout ?†? command line (V8.6 and later)
define(`confTO_DATAFINAL??, `timeout??) ?†? mc configuration (V8.6 and later)
The default timeout is one hour, and the specified minimum is 10 minutes. The mc technique
uses confTO_DATAFINAL, which has no default. If the value is shorter than the time
actually needed for the receiving site to deliver the message, the local sendmail times out
before seeing the ???Mail accepted??? message when, in fact, the mail was accepted. This can
lead to the local sendmail wrongly attempting to deliver the message later for a second time.
24.9.119.8 Timeout.datainit (V8.6 and later)
After all the recipients have been specified, the local sendmail declares that it is ready to
send the mail message itself.
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