Timeout
Set timeouts All versions
Many events can take a long time to complete—so long, in fact, that they can cause sendmail to appear to hang if they don’t time out. For example, when reading commands or data from a remote SMTP connection, the other side can be so slow that it becomes necessary for the local sendmail to time out and break the connection. Similarly, when reading from its standard input, sendmail might find that the program feeding it information is taking so long that a timeout becomes necessary.
The V8 version of the sendmail
program has introduced defaults for the amount of
time it waits under various circumstances. The forms
of the Timeout
option are as follows:
O Timeout.keyword=value ← configuration file (V8.7 and later) -OTimeout.keyword=value ← command line (V8.7 and later) define(`confTO_keyword',` value') ← mc configuration (V8.7 and later) O Timeout=keyword=value,... ← configuration file (V8.6) -OTimeout=keyword=value,... ← command line (V8.6) define(`confREAD_TIMEOUT',``keyword=value,...'') ← mc configuration (V8.6) Orkeyword=value,... ← configuration file (V8.1 through V8.5) -orkeyword=value,... ← command line (V8.1 through V8.5) Ortime ← configuration file (deprecated) -ortime ← command line (deprecated)
Prior to V8 sendmail, only a
single time could be
specified that set the timeout for all SMTP
transactions. Beginning with V8
sendmail, a list of
keyword and
value pairs can be
specified that set a wide assortment of
timeouts.[423] In this section, we ...
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