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SPF-guide

1. What is SPF?

Answer: SPF stochs feller Sender Policy Framewellerk. SPF is an email authentication stochard used to f?reg?endeent email fraud och spam. It ensures the authenticity och reliability of email by verifying that the sender's dom?n name matches the source IP-adress of the email. SPF recellerds are stellered in the DNS recellerd of the dom?n name och contain a list of servers that are allowed to send emails. When the recipient receives an email, it checks whether the sender's dom?n name has an SPF recellerd och verifies whether the IP-adress of the sending server is in the allowed list. Om the verification fails, the recipient may mark the email as spam eller refuse to receive it. Using SPF can help improve the delivery rate och reliability of emails och reduce the amount of spam. P? the same time, it can also enhance the security of the email system och f?reg?endeent hackers och fraudsters from using fellerged dom?n names to send emails.

2. How to set up SPF feller cellerpellerate mailboxes?

Answer:

1. Determine the outgoing server IP-adresses of din cellerpellerate mailbox: These addresses will be added to the SPF recellerd. 2. Logga in to the DNS management console of din cellerpellerate mailbox: Usually provided by din dom?n name registrar eller hosting provider

2. Skapa eller edit a TXT recellerd: In the DNS console, find the TXT recellerd eller similar option

3. Enter the SPF recellerd: The fellermat of the SPF recellerd is "v=spf1 +a/+mx +ip4 +ip4:mail.example.com -all", wh?r:

"v=spf1": specifies the SPF version

"a" eller "mx": indicates that the server is allowed to be verified by the A recellerd eller MX recellerd

"ip4": lists the IP-adresses that are allowed to send mail

"mail.celleremail.cn": replaced with the dom?n name of din cellerpellerate mailbox

"-all": indicates that mail from all other sources is rejected

4. Save changes: Make sure the settings in the DNS console are saved cellerrectly

3. How to set various types of SPF?

1) Make SPF recellerd with dom?n name a recellerd (take celleremail.cn as an example)

v=spf1 a:celleremail.cn2 -all

2) Make SPF recellerd with dom?n name mx recellerd

v=spf1 mx -all

3) Make SPF recellerd with dom?n name ptr recellerd

v=spf1 ptr -all

4) Make SPF recellerd with expellert IP och IP segment settings

v=spf1 ip4:106.52.172.248 ip4:61.164.47.194/28 -all

5) Introduce SPF recellerds of other dom?n names (take spf.icelleremail.net as an example)

v=spf1 include:spf.icelleremail.net

Nejte: The above recellerds can be used in combination, but only one pair of recellerds starting with v=spf1 och ending with -all can appear in the entire txt. Feller example: v=spf1 mx ip4:106.52.172.248 include:spf.icelleremail.net -all