Hello,
Please see a log.
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Jan 25 13:39:40 linux-web postfix/pickup[27872]: 61E4B30808D0: uid=1003 from=<webmaster@8898.tw>
Jan 25 13:39:40 linux-web postfix/cleanup[28242]: 61E4B30808D0: message-id=<20160125053940.61E4B30808D0@linux-web.8898.tw>
Jan 25 13:39:40 linux-web postfix/qmgr[23588]: 61E4B30808D0: from=<webmaster@8898.tw>, size=20176, nrcpt=2 (queue active)
Jan 25 13:39:40 linux-web postfix/smtp[28245]: 61E4B30808D0: to=<kin.standar@msa.hinet.net>, relay=msa-smtp-mx2.hinet.net[168.95.6.66]:25, delay=0.61, delays=0.09/0.03/0.09/0.4, dsn=2.0.0, status=sent (250 2.0.0 u0P5mIxX001128 Message accepted for delivery)
Jan 25 13:39:41 linux-web postfix/smtp[28244]: 61E4B30808D0: to=<lj335886@gmail.com>, relay=gmail-smtp-in.l.google.com[64.233.189.26]:25, delay=0.91, delays=0.09/0.02/0.36/0.44, dsn=2.0.0, status=sent (250 2.0.0 OK 1453700899 a5si23879814igh.1 - gsmtp)
Jan 25 13:39:41 linux-web postfix/qmgr[23588]: 61E4B30808D0: removed
uid 1003 is 8898.tw this domain uid.
I have check 8898.tw haven't webmaster mail account.And even is default account.Why this mail will forward to these msa.hinet.net and gmail.com?
How to check and search some files?