DMARCLY

在第一次设置 Mailgun 来发送电邮的时候，有可能会在收件箱中发现来自 Mailgun 的邮件带有类似于 "via mailgun.org"，"via mailgun.us"，或者 "via mailgun.info" 的警告。

这些警告意味着您还没有授权 Mailgun 来发送邮件，因此邮箱服务提供商认为这些邮件来自于 Mailgun，而不是您的组织。

要授权 Mailgun 来发送邮件，需要为 Mailgun 设置 SPF 和 DKIM。这个过程也叫电子邮件域名验证。

为 Mailgun 设置 SPF 和 DKIM 有 2 个好处：

This post provides step-by-step instructions on how to add an SPF record in Bluehost.

An SPF record is a TXT record published in the DNS on your domain, starting with v=spf1. It's used to perform SPF checks on the receiving email server…

This post provides step-by-step instructions on how to add an SPF record in CloudFlare.

An SPF record is a TXT record published in the DNS on your domain, starting with v=spf1. It's used to perform SPF checks on the receiving email server…

This post provides step-by-step instructions on how to add an SPF record in GoDaddy.

An SPF record is a TXT record published in the DNS on your domain, starting with v=spf1. It's used to perform SPF checks on the receiving email server…

This post provides step-by-step instructions on how to add an SPF record in Namecheap.

An SPF record is a TXT record published in the DNS on your domain, starting with v=spf1. It's used to perform SPF checks on the receiving email server…

当排查邮件送达问题时，您可能会在接收邮件服务器上看到类似下面的 SPF 错误：

SPF PermError: too many DNS lookups

SPF Permanent Error: too many DNS lookups

SPF Fail: too many DNS lookups

这些信息表明您域名上的 SPF 记录包含多于 10 次 DNS 查询，这使得该 SPF 记录违反了 SPF 规范的 SPF 10 次查询极限。

当该错误发生时，SPF 返回一个 PermError（永久性错误），该错误会使 SPF 验证无法通过。如果最终的邮件验证结果失败，…