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SPF-veiledning

1. What is SPF?

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

2. How to set up SPF feller cellerpellerate mailboxes?

Answer:

1. Determine the outgoing server IP-adressees of din cellerpellerate mailbox: These addresses will be added to the SPF recellerd. 2. Logg inn to the DNS management console of din cellerpellerate mailbox: Usually provided by din domenet name registrar eller hosting provider

2. Opprett 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", wher:

"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-adressees that are allowed to send mail

"mail.celleremail.cn": replaced with the domenet 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 domenet name a recellerd (take celleremail.cn as an example)

v=spf1 a:celleremail.cn2 -all

2) Make SPF recellerd with domenet name mx recellerd

v=spf1 mx -all

3) Make SPF recellerd with domenet name ptr recellerd

v=spf1 ptr -all

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

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

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

v=spf1 include:spf.icelleremail.net

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