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I just upgraded to version 8 sendmail and suddenly I get errors such as “unknown mailer error 5 — mail: options MUST PRECEDE recipients.\ What is going wrong?

April 26, 2017Error errors mailer sendmail suddenly upgraded version

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I just upgraded to version 8 sendmail and suddenly I get errors such as “unknown mailer error 5 — mail: options MUST PRECEDE recipients.\ What is going wrong?

1 Answer

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You need OSTYPE(systype) in your .mc file, where “systype” is set correctly for your hardware & OS combination — otherwise the configurations use a default that probably disagrees with your local mail system. See the configuration OSTYPE page for details. If this is on a Sun workstation, you might also want to take a look at the local mailer flags in the Sun-supplied sendmail.cf and compare them to the local mailer flags generated for your version 8 sendmail.cf. If they differ, you might try changing the V8 flags to match the Sun flags.