For example, an attempt to write to a file that has any execute bit set in
its permissions can yield an error, as can writing to a file that has more than one link.
Writing to a file that is not a regular file can cause an error if the SafeFileEnvironment
option (?§24.9.103 on page 1084) is set. Note that for some problems that produce this
error, sendmail won??™t print an error message.
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6.5 sendmail??™s exit( ) Status | 229
6.5.2 EX_CONFIG
A configuration error sendmail exit value
The EX_CONFIG exit value (the value 78) means that a fatal configuration problem was
found, but not necessarily while reading the configuration file. Failure of a delivery agent to
function correctly can lead to this kind of failure.
Note that the EX_CONFIG error and EX_SOFTWARE error (discussed later) cause the local postmaster
to get a copy of the message on the presumption that local errors can only be fixed
locally.
6.5.3 EX_IOERR
A system I/O error occurred sendmail exit value
An exit value of EX_IOERR (the value 74) means that a serious operating system error
occurred. This class of error relates mostly to disk I/O.
6.5.4 EX_OK
No problems, all was fine sendmail exit value
The EX_OK exit code (value 0) indicates that sendmail did its job and there were no errors.
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