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Date:      Sat, 8 Apr 2000 00:25:14 -0700 (PDT)
From:      Gregory Neil Shapiro <gshapiro@sendmail.org>
To:        Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>
Cc:        Tobias Roth <roth@iamexwi.unibe.ch>, freebsd-stable@FreeBSD.ORG
Subject:   Re: sendmail 8.10.0 
Message-ID:  <14574.57050.338526.158436@horsey.gshapiro.net>
In-Reply-To: <200004021934.MAA55371@cwsys.cwsent.com>
References:  <Pine.GSO.4.10.10004022119110.29055-100000@giger> <200004021934.MAA55371@cwsys.cwsent.com>

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Cy.Schubert> I believe that Sendmail 8.10.0 is slightly broken.  In tests,
Cy.Schubert> unless I did something wrong, SuperSafe does not create queue
Cy.Schubert> files in mqueue, instead queueing in memory.  So, in the case
Cy.Schubert> of a system crash mail would be lost.  To see for yourself,
Cy.Schubert> install 8.10.0 and run a long running cron job (must be cron
Cy.Schubert> not at/batch) and notice that no queue files are created until
Cy.Schubert> enough output has been created.  8.9.3 creates queue files
Cy.Schubert> regardless of the amount of output spooled.

This is intentional, a benefit of the new buffered file I/O system.
However, it is still safe in that sendmail will not accept responsibility
for the message (either by responding to the final '.' during the SMTP DATA
phase or by exiting with EX_OK from the command line) until the message is
either delivered to the destination (DeliveryMode=Interactive) or safely
(including fsync()'ed) on disk (all other DeliveryMode's).  In fact, 8.10.0
is safer than 8.9.3 in that it has does some extra steps to make sure the
meta-data is sync'ed as well for those running with softupdates turned on.


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