What is SPF？
SPF is one of the basic Email Authentication method, that documented in RFC7208.
SPF make an effect against prevent Mail spoofing through Email Authentication.
How to set SPF
You need add new record on DNS server in order to publish SPF record.
Please make sure to DNS hosting provider cause the procedure is different.
Our SPF Record
"v=spf1 include:spf.haihaimail.jp~all"
Please add the following statement when it has SPF record already
⇒include:spf.haihaimail.jp
Procedure detail
Unfortunately, we cannot on top of details .
Please make sure to your DNS hosting provider or Internal Computing team.
Example
Amazon Web Service
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-creating.html
Google Cloud Platform
https://cloud.google.com/dns/records
GoDaddy
https://www.godaddy.com/help/add-an-spf-record-19218?
STRATO
https://www.strato.com/faq/en_us/hosting/can-i-manage-my-own-dns-entries-at-strato/
