viniciuscenci
viniciuscenci
/ DKIM_SPF_Sendmail
Created
May 29, 2023 14:08
— forked from artmouse/DKIM_SPF_Sendmail
DKIM + SPF + Sendmail for multiple domains (Ubuntu)
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| DKIM is DomainKeys Identified Mail and is used in mail servers, such as Postfix or Sendmail to sign e-mails and thus authenticating the sender so that a forgery can be detected. It also reduces the possibility of an e-mail being flagged as spam, but it's not a definite prevention. | |
| A much simpler method is using SPF (Sender Policy Framework) which, in a nutshell, verifies the sender IP address. | |
| According to the internet, using both should result to ????, PROFIT !!!. | |
| SPF does not need a specific configuration. Whitelisted servers are listed in a DNS record, TXT or SPF, and an example record is: | |
| example.com. IN TXT "v=spf1 a mx ~all" |