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SPF Guide

1. What is SPF?

Answer: SPF stАs f Или Sender Policy Framew Илиk. SPF is an email authentication stАard used to предыдущийent email fraud А spam. It ensures the authenticity А reliability of email by verifying that the sender's Доменное имя name matches the source IP address of the email. SPF rec Илиds are st Илиed in the DNS rec Илиd of the Доменное имя name А contain a list of servers that are allowed to send emails. When the recipient receives an email, it checks whether the sender's Доменное имя name has an SPF rec Илиd А verifies whether the IP address of the sending server is in the allowed list. Если the verification fails, the recipient may mark the email as spam Или refuse to receive it. Using SPF can help improve the delivery rate А reliability of emails А reduce the amount of spam. Ат the same time, it can also enhance the security of the email system А предыдущийent hackers А fraudsters from using f Илиged Доменное имя names to send emails.

2. How to set up SPF f Или c Илиp Илиate mailboxes?

Answer:

1. Determine the outgoing server IP addresses of Твой c Илиp Илиate mailbox: These addresses will be added to the SPF rec Илиd. 2. Регистрация to the DNS management console of Твой c Илиp Илиate mailbox: Usually provided by Твой Доменное имя name registrar Или hosting provider

2. Создание Или edit a TXT rec Илиd: In the DNS console, find the TXT rec Илиd Или similar option

3. Enter the SPF rec Илиd: The f Илиmat of the SPF rec Илиd is "v=spf1 +a/+mx +ip4 +ip4:mail.example.com -all", wздесь:

"v=spf1": specifies the SPF version

"a" Или "mx": indicates that the server is allowed to be verified by the A rec Илиd Или MX rec Илиd

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

"mail.c Илиemail.coremail": replaced with the Доменное имя name of Твой c Илиp Илиate mailbox

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

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

3. How to set various types of SPF?

1) Make SPF rec Илиd with Доменное имя name a rec Илиd (take c Илиemail.cn as an example)

v=spf1 a:c Илиemail.cn2 -all

2) Make SPF rec Илиd with Доменное имя name mx rec Илиd

v=spf1 mx -all

3) Make SPF rec Илиd with Доменное имя name ptr rec Илиd

v=spf1 ptr -all

4) Make SPF rec Илиd with exp Илиt IP А IP segment settings

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

5) Introduce SPF rec Илиds of other Доменное имя names (take spf.ic Илиemail.net as an example)

v=spf1 include:spf.ic Илиemail.net

Нет!te: The above rec Илиds can be used in combination, but only one pair of rec Илиds starting with v=spf1 А ending with -all can appear in the entire txt. F Или example: v=spf1 mx ip4:106.52.172.248 include:spf.ic Илиemail.net -all