WEKO3
アイテム
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MTAから見たSPAMメールの特徴
https://yamagata.repo.nii.ac.jp/records/922
https://yamagata.repo.nii.ac.jp/records/922df7e33e0-4f49-49cc-bd9f-fe8760f1847e
名前 / ファイル | ライセンス | アクション |
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kiyoue-32-027to036.pdf (446.6 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2014-07-11 | |||||
タイトル | ||||||
タイトル | MTAから見たSPAMメールの特徴 | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
山本, 広志
× 山本, 広志 |
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著者別名 | ||||||
姓名 | YAMAMOTO, Hiroshi | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | In an attempt to investigate the features of spam emails from the viewpoint of MTA, experiments were\nmade in 2009 with five real servers installed in Japan and a domain name under .jp. It has been found that\nnot only did a group of spam emails arrive at the server with a high MX priority in the DNS, but also\nanother did at the one with a low MX priority in comparable numbers and the remaining mails at the other\nwith A record in one fewer number of digits. 99.99% of these spam emails came via IPv4 whereas only\n0.01% via IPv6. The countries of origin where their IP addresses were assigned to most were Brazil, Korea,\nVietnam, China and India in descending order. These five countries made up 42 % of all. 19% of envelope\nfrom domains in the spam emails were identified as the destination domain. 51% of them had their existent\ndomains, but were not reachable email addresses. Reachable addresses were 27% of all. Although SPF and\nSender ID were registered in 31% and 35% of domains respectively, DomainKeys and DKIM were less than\n0.05%. In one of the experiments in which greet pause was set, about 50% connections were disconnected\nwithin 10 seconds. After that, the frequency of accumulated disconnections increased in a stair-step fashion\nuntil almost all were eventually disconnected within 120 seconds. | |||||
書誌情報 |
山形大学紀要. 工学 = Bulletin of Yamagata University. Engineering 巻 32, p. 27-36, 発行日 2010-02-15 |
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書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00242991 | |||||
その他の言語のタイトル | ||||||
その他のタイトル | The Features of the Spam Emails from the Viewpoint of MTA | |||||
タイトル(ヨミ) | ||||||
その他のタイトル | MTA カラ ミタ SPAM メール ノ トクチョウ | |||||
出版者 | ||||||
出版者 | 山形大学 | |||||
出版者(ヨミ) | ||||||
ヤマガタ ダイガク | ||||||
別言語の出版者 | ||||||
Yamagata University | ||||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | 論文(Article) | |||||
資源タイプ・ローカル | ||||||
紀要論文 | ||||||
資源タイプ・NII | ||||||
Departmental Bulletin Paper | ||||||
資源タイプ・DCMI | ||||||
text | ||||||
資源タイプ・ローカル表示コード | ||||||
2 |