9.77
on page 839) as they can interact with this option.
The DataFileBufferSize option is not safe. If specified from the command line, it can cause
sendmail to relinquish its special privileges.
24.9.29 DeadLetterDrop
Define dead.letter file location V8.10 and later
When handling bounced mail, sendmail first tries to deliver it to the envelope sender. If
that fails, it next tries to deliver to the user defined by the DoubleBounceAddress option
(?§24.9.44 on page 1025). If the message cannot be delivered to that user (perhaps because a
valid user was not specified), sendmail attempts to save the message to the file defined by
this DeadLetterDrop option, usually the file /var/tmp/dead.letter.
* With V8.10 and V8.11, this option could be used only on systems that defined the confSTDIOTYPE build
macro (?§2.7.65 on page 98) as torek.
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24.9 Alphabetized Options | 999
The DeadLetterDrop option is declared like this:
O DeadLetterDrop=path ?†? configuration file (V8.10 and later)
-ODeadLetterDrop=path ?†? command line (V8.10 and later)
define(`confDEAD_LETTER_DROP??,`path??) ?†? mc configuration (V8.10 and later)
Here, path is the full path to the file for saving unsaveable bounce messages. If path is
omitted, or if this entire option is omitted, no saving is performed, and instead sendmail
will log a panic and leave the message in the queue, but renamed as a Qf file.
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