moe refuses to talk to its self

"Hugh_Messenger.EuroPARC"@Xerox.COM
18 Aug 88 15:45:53 PDT (Thursday)

When a computer refuses to talk to itself, is this a sign that Slack has finally
reached The Machine?

-- Rev Wu Wei

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[...]
Subject: Returned mail: Service unavailable
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----- Transcript of session follows -----
>>> HELO moe.cs.ucla.edu
<<< 553 moe.cs.ucla.edu I refuse to talk to myself
554 <dan@valhalla>... Service unavailable: Bad file number

[...]
Subject: Yogic Flying High Jump World Record
[...]