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Is it possible to disable mail spooling/retry on Sendmail?

Is it possible to disable mail spooling/retry on Sendmail?

Is it possible to disable mail spooling/retry on Sendmail?


I need to configure a sendmail relay to guarantee that the first mail that comes in will be the first to go out.

Can anyone advise if this is possible with sendmail, and how?

It is ok for the rest of the mails to be delayed, if the first mail is deferred. Sequencing is more important than performance.

If not, is it possible to disable the "spool and forward" behaviour of sendmail? (ie so that mails will remain in the outbox of mail client, only to be sent later by mail client itself should problems be encountered by sendmail that needs deferring)

Ps: I know this is a weird configuration. This relay is not to be used for normal email. Rather, I need to use the sendmail relay function to submit data to a mail server for a B2B application.


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