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An email loop is an infinite loop phenomenon, resulting from mail servers, scripts, or email clients that generate automatic replies or responses. If one such automatic response triggers another automatic response on the other side, an email loop is created. The process can continue until one mailbox is full or reaches its mail sending limit. In theory, the email loop could last indefinitely. Email loops may be caused accidentally or maliciously, causing denial of service. Although rare, email loops involving more than two participants can also occur. Email loops are not as common today as in the past, due to changes to email software, both on the client side and the server side, that prevent automatic replies to vacation responses and bounced mail responses. == Costs of an email loop == * Bandwidth: Email loops use up limited bandwidth over networks. * Processing time: Email loops will take up processing time, and could slow down other processes. * Disk space: Automatic emails are usually stored in the mailboxes of participants. * Human Time: Network administrators may have to intervene to fix the problem, or clean up mailboxes. Also the mailbox user/owner will have to delete the numerous responses in order to clean up the mailbox. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Email loop」の詳細全文を読む スポンサード リンク
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