只能有一条，但是可以一条记录里面加多个ip
不能. 参见From RFC 4408:3.1.2. Multiple DNS Records A domain name MUST NOT have multiple ...
DougBartleymultiple SPF records for the same domain are NOT supported. DougBartley Copper Contributor Apr 10, 2019 VasilMichevWe have a single SPF record setup in DNS and then 2 TXT records that are referenced in the SPF record. All records are read as one by recipient servers and we hav...
Step 8.Fill the TXT Value field with your SPF record (i.e. “v=spf1 a mx include: exampledomain.com ~all””); Step 9.Specify the Time To Live (TTL), enter 3600 or leave the default; Step 10.Click “Save” or “Add Record” to publish the SPF TXT record into your DNS. Your...
SPF records must be published as a DNS TXT (type 16) Resource Record (RR) [RFC1035]. See RFC7208 for further detail. SPF is the cornerstone of your email delivery strategy. Are you confident your email is getting through? MxToolbox is YOUR expert on email deliverability. MxDelivery Cent...
Avoid using the redirect= mechanism in your SPF record: Using redirect= can limit users by not letting them add other sources. As organizations tend to use multiple email strategies, it can limit that process. Instead, include all authorized email sources in your SPF by "include:" and other...
您可以在一个域名上发布多条 SPF 记录吗?答案是否定的:一个域名一定不能有多条 SPF 记录,否则 SPF 会失败并返回永久错误(PermError)。 SPF 记录是位于 DNS 中的 TXT 记录,准确地以 "v=spf1" 开始,后面跟一系列的 mechanisms 和 modifiers。 SPF 检查先获取域名上面的所有以 "v=spf1" 开始的 TXT 记录...
v=spf1 +a +mx include:_1c3125358d5b0660b2012471e2c2b23a.spf.dnssmarthost.net include:_spf.mailspamprotection.com ~all The version prefix (v=spf1) tells the parsers to interpret this TXT record as the SPF record since a domain can have multiple TXT records in its DNS zone. Then com...
Multiple domains can be included within an SPF record but this tag will only work for valid domains. Finally, -all tells the server that addresses not listed in the SPF record are not authorized to send emails and should be rejected. Alternative options here include ~all, which states ...
Hostname has returned multiple SPF Records The use of alternative DNS RR types that was formerly supported during the experimental phase of SPF was discontinued in 2014. SPF records must now only be published as a DNS TXT (type 16) Resource Record (RR) [RFC1035]. SeeRFC 7208for further de...