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internet:mail:sender_auth [2019/05/07 13:43] gcooper |
internet:mail:sender_auth [2019/05/08 08:48] (current) gcooper |
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SPF (sender policy framework), DKIM (domain keys identified mail) and DMARC (domain message authentication reporting and conformance) are **sender authentication mechanisms** that use DNS. | SPF (sender policy framework), DKIM (domain keys identified mail) and DMARC (domain message authentication reporting and conformance) are **sender authentication mechanisms** that use DNS. | ||
+ | |||
+ | ===== Testing ===== | ||
+ | |||
+ | **Various Tools**: https:// | ||
+ | |||
+ | **DKIM Test Tool**: https:// | ||
+ | |||
+ | **DMARC Test Tool**: https:// | ||
+ | |||
+ | A very useful test is to **send a message from the domain under test to a Gmail address**. | ||
+ | |||
===== SPF ===== | ===== SPF ===== | ||
- | SPF is the most widely used sender authentication mechanism. | + | SPF is the most widely used sender authentication mechanism. |
A DNS SPF (TXT) record just tells the recipient server which sender servers are authorized to send e-mail for a particular domain. | A DNS SPF (TXT) record just tells the recipient server which sender servers are authorized to send e-mail for a particular domain. | ||
- | ===== DKIM ===== | + | ==== Virtualmin |
- | **DKIM** is a standard for signing email messages so that the recipient can verify the sender' | + | **Virtualmin -> < |
- | Signing is done with a **private key on the sender' | + | {{ : |
- | ==== Testing | + | ===== DKIM ===== |
- | **DKIM | + | **DKIM** |
- | **DMARC Test Tool**: https:// | + | Signing is done with a **private key on the sender' |
- | + | ||
- | A very useful test is to send a message from the domain | + | |
==== Virtualmin ==== | ==== Virtualmin ==== |