Ordinarily, V8 sendmail sends notification of
failed mail to the envelope sender. It specifically does not send
notification to the addresses listed in the
Errors-To: header. It does this because the
Errors-To: header violates RFC1123. For additional
information about the
Errors-To: header, see Errors-To:.
UseErrorsTo option is available to prevent
older versions of mail-reading software from failing. When set, it
allows error notification to be sent to the address listed in the
Errors-To: header in addition to that sent to the
The forms of the
UseErrorsTo option are as follows:
O UseErrorsTo=bool ← configuration file (V8.7 and later) -OUseErrorsTo=bool ← command line (V8.7 and later) define(`confUSE_ERRORS_TO',bool) ← mc configuration (V8.7 and later) Olbool ← configuration file (deprecated) -olbool← command line (deprecated)
The optional argument
bool, when missing,
defaults to true (errors are sent to the
Errors-To: header). If this option is missing
entirely, it defaults to false (the
header is ignored).
UseErrorsTo option is not safe. If specified
from the command line, it can cause sendmail to
relinquish its special privileges.