I got tired of this stuff, so I removed the fallbacksmarthost option in sendmail.cf and restarted sendmail. Hopefully it'll stop mailing constantly now:
----- Transcript of session follows ----- 550 5.1.2 [EMAIL PROTECTED] Host unknown (Name server: mailhost.zones.apache.org: host not found) -- Randomly Selected Tagline: "Unfortunately, the "Can't write utmp, wtmp" message, or any other variation is a symptom with a myriad of possible causes. The causes could range from a bad utmp or wtmp entry to the wind blowing slightly to the north." - Paul Carver
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