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--- internet:mail:sender_auth [2019/05/07 13:54]
gcooper
+++ internet:mail:sender_auth [2019/05/08 08:48] (current)
gcooper
@@ Line 4: / Line 4: @@
 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://dmarcian.com/dmarc-tools/
+**DKIM Test Tool**: https://mxtoolbox.com/dkim.aspx
+**DMARC Test Tool**: https://mxtoolbox.com/DMARC.aspx
+A very useful test is to **send a message from the domain under test to a Gmail address**.  Once the message is received in Gmail, perform a ''Show Original'' to view the message headers.
 ===== SPF =====
@@ Line 22: / Line 33: @@
 Signing is done with a **private key on the sender's server**, which matches a **public key added to in the sender's DNS domain**. The recipient can lookup this key at the domain in the ''From'' address, and use it to ensure that the email signature was created using the corresponding private key, which proves that the message was really sent from that domain.
-==== Testing ====
-**DKIM Test Tool**: https://mxtoolbox.com/dkim.aspx
-**DMARC Test Tool**: https://mxtoolbox.com/DMARC.aspx
-A very useful test is to send a message from the domain under test to a Gmail address.  Once the message is received in Gmail, perform a ''Show Original'' to view the message headers.
 ==== Virtualmin ====

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