...2、SPF Record v=spf1... 7.2K41 在Debian 8上使用Postfix配置SPF和DKIM SPF(发件人策略框架)是一种向邮件服务器标识允许哪些主机为给定域发送电子邮件的系统。设置SPF有助于防止您的电子邮件被归类为垃圾邮件。...完整语法位于SPF记录语法页面。...示例1 允许来自域的MX记录中列出的所有主机的邮件: v=...
If example.com has no SPF record, the result is PermError. Suppose example.com’s SPF record werev=spf1 a ~all. Look up the A record for example.com. If it matches 1.2.3.4, return Pass. If there is no match, other than the included domain’s “~all”, the include as a whole...
v=spf1 ip4:192.0.2.0 ip4:192.0.2.1 include:examplesender.email -all This example lets the server know what type of record this is, states the approved IP addresses and a third-party for this domain, and tells the server what to do with non-compliant emails. Let’s break down how the...
For example, we could amend the previous record like so: v=spf1 ipv4:219.0.188.54 ipv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334 ip4:192.168.0.0/16 ~all 2. Redirect to a policy hosted on another domain v=spf1 redirect=domain_b.com This is a common setup for organizations with many...
Avoid “a” and “mx” entries: These mechanisms are often useless and probably should not be included in your SPF record. Remove records for vendors that are unable to be configured forSPF alignment. Delete duplicate SPF mechanisms. Discard top-level domain includes. Many email service providers...
the SPF record exceeds the 10-DNS-lookup limit; new 3rd-party email delivery services are added; SPF updates in the DNS, including those from 3rd-party services; DKIM updates in the DNS. Unauthenticated, a legitimate email is probably treated as spam or rejected outright, which mean...
whether mail is sent by an email service provider, a hosting provider, an ISP or some other third-party mail server that sends email on behalf of an organization's domain. The process for creating the new SPF record also may be complicated depending on the domain owner's email ...
For more information about *.onmicrosoft.com domains, see Why do I have an "onmicrosoft.com" domain?. If you use one or more custom domains for email (for example, contoso.com): The Microsoft 365 enrollment process already required you to create or modify the SPF TXT re...
These messages may vary, but they all mean the same thing: your domain isn’tset up with the SPFemail authentication standard. Key Takeaways A“No SPF Record Found” error indicates that your domain is missing an SPF record in its DNS settings. ...
If Microsoft Office 365 is your email provider, here’s how to set up your SPF record for the relevant server. We’ll start with a simple process you can follow for any domain provider, then add more specific details for popular domain providers like Namecheap, Cloudflare, and Bluehost. ...