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Bryan Costales, Claus Assmann, George Jansen, Gregory Shapiro

"sendmail, 4th Edition"

The mc technique uses
confTO_QUIT, for which there is no default.
24.9.119.21 Timeout.rcpt (V8.6 and later)
After sending the MAIL From: command, the local sendmail issues one RCPT To: command
for each envelope recipient. One such RCPT To: line might look like this:
RCPT To:
The local sendmail then waits for acknowledgment, which looks like this:
250 2.1.5 ... Recipient ok
The amount of time that the local sendmail waits for acknowledgment of each RCPT To:
command is set with the rcpt keyword. Here are the forms:
O Timeout.rcpt=timeout ?†? configuration file (V8.6 and later)
-OTimeout.rcpt=timeout ?†? command line (V8.6 and later)
define(`confTO_RCPT??, `timeout??) ?†? mc configuration (V8.6 and later)
The default timeout value is one hour,* and the specified minimum is five minutes. The mc
technique uses confTO_RCPT, for which there is no default.
24.9.119.22 Timeout.resolver (V8.10 and later)
The resolver library contains the routines for looking up hostnames and addresses with
DNS. Those lookups can sometimes take a long time to complete, either because a host??™s
name server is slow or down, or because of routing problems. Two timeout-type variables
are available to limit how long these DNS lookups can take. One variable specifies the
amount of time those routines wait between attempts to get the information.


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