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< h1 > 【Postfix】スパム踏み台になった場合、mailq削除方法です< / h1 >
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凜、
2020年01月24日
—
< a href = "/tags/jp/" > jp< / a > ,
< a href = "/tags/blog/" > blog< / a > ,
< a href = "/tags/postfix/" > postfix< / a > ,
< a href = "/tags/メール/" > メール< / a > ,
< a href = "/tags/スパム/" > スパム< / a > ,
< a href = "/tags/linux/" > linux< / a > ,
< a href = "/tags/server/" > server< / a >
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< p > 毎日皆さんはメールを送りますが、簡単なパスワードを使い方又はパスワードハッキングが多すぎます。< br / >
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だから、メールサーバーはスパム踏み台になる率が高いです。< / p >
< p > スパム踏み台になったかならないかどうかを確認して。< / p >
< pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > mailq | tail
< / code > < / pre > < pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > AD00A13E5C22 8564 Fri Jan 24 09:33:48 21-420159-8257-0-19-7992-1-contact@example2.co.jp
(host alt1.gmail-smtp-in.l.google.com[108.000.000.000] said: 421-4.7.28 [52.000.000.000 15] Our system has
detected an unusual rate of 421-4.7.28 unsolicited mail originating from your IP address. To protect our
421-4.7.28 users from spam, mail sent from your IP address has been temporarily 421-4.7.28 rate limited.
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yamada@gmail.com
-- 5,808 Kbytes in 726 Requests.
< / code > < / pre > < p > 726リクエストがあります。< br / >
確かにスパム踏み台ですよね…< / p >
< p > まずはFROMメールアドレスを調べてみましょう。< br / >
下記コマンドで最新のmailqをログファイルにバックアップします。< / p >
< pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > mailq > /tmp/< span style = "color:#666" > (< / span > お好みファイル名< span style = "color:#666" > )< / span > .log
< / code > < / pre > < p > 調べてみましょうか?< / p >
< pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > cat /tmp/< span style = "color:#666" > (< / span > お好みファイル名< span style = "color:#666" > )< / span > .log | less
< / code > < / pre > < p > 「/」文字を押して、「FROM command」を書いて、IDと始める列を見つけてみて。< / p >
< pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > taro@yahoo.co.jp
taro@yahoo.com.au
taro@gmail.com
taro@hotmail.com
11F8D155CE9D 3947 Fri Jan 24 06:02:11 yamada.taro@example.co.jp
< / code > < / pre > < p > 次は先に作ったログファイルを確認したメールアドレスにフィルタします。< / p >
< pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > perl -ne < span style = "color:#b44" > ' print " $1\n" if (/^(\w+).+ yamada\.taro\@example\.co\.jp/);' < / span > /tmp/< span style = "color:#666" > (< / span > お好みファイル名< span style = "color:#666" > )< / span > .log > /tmp/< span style = "color:#666" > (< / span > お好み削除IDに入れたファイル名< span style = "color:#666" > )< / span > .txt
< / code > < / pre > < p > やっとmailqに入ったスパムを削除しましょう。< / p >
< pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > cat /tmp/< span style = "color:#666" > (< / span > お好み削除IDに入れたファイル名< span style = "color:#666" > )< / span > .txt | postsuper -d -
< / code > < / pre > < p > もう一回mailqを確認して< / p >
< pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > mailq | tail
< / code > < / pre > < pre style = "background-color:#f8f8f8;overflow-x: auto" > < code > 398D6A03A8D 8564 Fri Jan 24 09:33:48 21-420159-8257-0-19-7992-1-contact@example2.co.jp
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detected an unusual rate of 421-4.7.28 unsolicited mail originating from your IP address. To protect our
421-4.7.28 users from spam, mail sent from your IP address has been temporarily 421-4.7.28 rate limited.
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< / code > < / pre > < p > 未送信スパムメールを削除しました!< br / >
お疲れ様!< / p >
< p > 以上< / p >
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