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An SPF record is a line of text published in the DNS that contains the list of authorized IP addresses from which email can be sent for the domain. When a mail server receives a message, it can check the IP address in the email header to see if it matches the address in the SPF re...
When an email is sent, the receiving mail server checks the SPF record in the DNS to verify if the email sender's IP address is authorized. The SPF record consists of qualifiers such as "include," "a," and "mx," which indicate the mechanisms for validating the sender's identity. By ...
An SPF (Sender Policy Framework) record is a type of DNS (Domain Name System) record that identifies which mail servers are permitted to send email on behalf of your domain. By listing authorized sending IPs in the SPF record, it helps preventemail spoofing—where attackers send emails from ...
According to IETF’s RFC-7208, the SPF record must be a single string of text in a single DNS TXT record. Multiple SPF records for the same domain name are not permitted, thus, if there is more than one SPF record – they will not function properly. What is the Return-Path email ad...
Publishing an SPF record in your “example.com” DNS records tells the world whichserver IP addressesare authorized to send emails from “@example.com” email addresses. If you host your company email in cloud, your hosting provider should be able to provide you with instructions on how to ...
每条 SPF record 中的任何 SPF modifier 只能够使用一次。未知的 modifiers 会被忽略。 redirect modifier redirect modifier 有一个域名参数值: redirect=<domain> 在domain 上面的 SPF 记录会代替当前的 SPF 记录。 例如,domain.com 发布了以下的 SPF 记录: v=spf1 redirect=example.com 如果example.com 上面没...
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What does an SPF record look like? SPF records must follow certain standards in order for the server to understand how to interpret its contents. Here is an example of the core components of an SPF record: v=spf1 ip4:192.0.2.0 ip4:192.0.2.1 include:examplesender.email -all ...
SPF 记录 —— 全新支持！ SPF 用于指定发送邮件的服务器 是一种高效的反垃圾邮件解决方案 SPF是为了...