The UnsafeGroupWrites option is not safe. If specified from the command line, it can cause
sendmail to relinquish its special privileges.
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24.9 Alphabetized Options | 1115
24.9.126 UseErrorsTo
Use Errors-To: for errors V8.1 and later
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 ?§25.12.18 on page 1156.
The 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 envelope sender.
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).
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