SUMMARY: Ideal queue time for sendmail

From: Lenny Turetsky (
Date: Tue Oct 25 1994 - 23:45:57 CDT

First off, thanks to:
     clark rudder <> (Don Lewis)
     Stefan Mochnacki <> (Ulla Fischer)
     Claus Assmann <>
     "C.R. Ritson" <> (Glenn Satchell - Uniq Professional Services) (Eckhard Rueggeberg) (Don Lewis)
     Neil Sobrado <>
     pamela@Legato.COM (Pamela Pledger)
     Dan Stromberg - OAC-DCS <>
     Neil Rickert <> (Jacques Beigbeder) (Eric Wampner ORL)
     "Fuat C. Baran" <>
     Bill Morrow <>

The general consensus is that -q[1-5]m is too small and simply wastes
resources. Most people suggested -q30m or -q1h.

What most people did not mention (and I did not know about) is that the
reason that mail delivery had been slow at -q5m was that these systems
were set up to do mail processing at queue time *only*. I don't know who
had set it up this way, but the machines here had the line `Odqueue' in
their /etc/'s, which had to be changed to `Odbackground' so
that they would initially attempt to deliver mail at send-time, and only
use the queue if the initial attempt failed.

Thanks to Don `Truck' Lewis ( for this insight.

Please note that `Odqueue' and `Odbackground' are equivalent to `Odq' and
`Odb' respectively.

Thanks again to all who responded.


 | Yale Economics Dep't | Lenny Turetsky |
 | System Administrator | |
 | My employers paid for some of my time and energy. |
 | My opinions were never for sale. |

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