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add DMARC

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Son NK 2020-01-28 14:40:36 +07:00
parent bd8af17171
commit 4edf7f2003
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@ -205,7 +205,7 @@ From Wikipedia https://en.wikipedia.org/wiki/Sender_Policy_Framework
> Sender Policy Framework (SPF) is an email authentication method designed to detect forging sender addresses during the delivery of the email
Similar to DKIM, setting up SPF is highly recommended.
Add a TXT record for `mydomain.com.` with the value
Add a TXT record for `mydomain.com.` with the value:
```
v=spf1 mx -all
@ -219,6 +219,30 @@ dig @1.1.1.1 mydomain.com txt
should return the above value.
#### DMARC
From Wikipedia https://en.wikipedia.org/wiki/DMARC
> It (DMARC) is designed to give email domain owners the ability to protect their domain from unauthorized use, commonly known as email spoofing
Setting up DMARC is also recommended.
Add a TXT record for `_dmarc.mydomain.com.` with the following value
```
v=DMARC1; p=quarantine; adkim=r; aspf=r
```
This is a `relaxed` DMARC policy. You can also use a more strict policy with `v=DMARC1; p=reject; adkim=s; aspf=s` value.
To verify, the following command
```bash
dig @1.1.1.1 _dmarc.mydomain.com txt
```
should return the set value.
For more information on DMARC, please consult https://tools.ietf.org/html/rfc7489
### Docker