sg-epk@jtk93.x29.jp はこの世界線に存在していません.
----- The following addresses had permanent fatal errors -----
<sg-epk@jtk93.x29.jp>
(reason: 550 5.1.1 <sg-epk@jtk93.x29.jp>... User unknown)

----- Transcript of session follows -----
.. while talking to mail.x29.jp.:
>>> DATA
<<< 550 5.1.1 <sg-epk@jtk93.x29.jp>... User unknown
550 5.1.1 <sg-epk@jtk93.x29.jp>... User unknown
<<< 503 5.0.0 Need RCPT (recipient)

----- The Message from sg-epk -----
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