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MX、SPF 和 DMARC 记录

MX、SPF 和 DMARC 记录是与域名系统(DNS)相关的记录,用于配置和提供有关邮件服务器、电子邮件发送策略以及邮件身份验证的信息。这些记录对于确保邮件的可靠传递、减少垃圾邮件和提高电子邮件安全性至关重要。

  1. MX 记录(Mail Exchange):

    • 用途:MX 记录指定了接收电子邮件的邮件服务器的地址。
    • 配置:MX 记录由域名所有者在 DNS 中配置,它包含一个或多个邮件服务器的域名和相应的优先级,表示邮件应该按照优先级顺序传递给这些邮件服务器。
  2. SPF 记录(Sender Policy Framework):

    • 用途:SPF 记录用于指定哪些邮件服务器有权发送特定域名的电子邮件。
    • 配置:SPF 记录通过 DNS 配置,其中包含了允许发送邮件的授权邮件服务器的 IP 地址。接收方邮件服务器可以检查 SPF 记录,验证发送方是否是授权的邮件服务器。
  3. DMARC 记录(Domain-based Message Authentication, Reporting, and Conformance):

    • 用途:DMARC 记录用于提供一种机制,确保电子邮件发送方的身份验证,并为域名的所有者提供有关未通过身份验证的邮件的报告。
    • 配置:DMARC 记录由域名所有者在 DNS 中配置。它指定了用于验证电子邮件的 SPF 和 DKIM(DomainKeys Identified Mail)策略,并定义了未通过验证的邮件的处理方式,以及报告的接收地址。

这些记录共同用于帮助确保电子邮件的可靠性、提高邮件的安全性,并减少垃圾邮件和欺诈性电子邮件。在设置和配置这些记录时,域名管理员通常需要使用 DNS 管理界面或控制面板来进行相应的配置。

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