-D

-D

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Don't use if DeliveryMode= defer

V8.10 and above

The defer setting of the DeliveryMode option (DeliveryMode) is intended for sites that do not have a continuous connection to the Internet ( specifically , dial-on-demand sites). For such sites, mail should be placed in the queue without interacting with the Internet (which is likely unavailable). Then, when the Internet connection is made, a normal queue run will deliver the mail.

Some database maps (such as those that look up hosts and possibly those that log messages with syslog ) should probably not be used when sendmail is running in defer mode. This -D database switch can also be used with a few database-map types. When it is, it advises those types to not operate when sendmail is in defer mode.