From 7956a43aa0ab9fd7ba1c26d2eadcc93c855de37c Mon Sep 17 00:00:00 2001 From: Dennis Baaten Date: Thu, 28 Nov 2019 17:28:04 +0100 Subject: [PATCH] Update DKIM-how-to.md --- DKIM-how-to.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/DKIM-how-to.md b/DKIM-how-to.md index 59d9087..7074676 100644 --- a/DKIM-how-to.md +++ b/DKIM-how-to.md @@ -35,7 +35,7 @@ A common used technique used by spammers is to trick the receiving party into be * It is generally recommended to explicitly configure parked domains to not use e-mail. For DKIM this is done with an empty policy: "v=DKIM1; p=". ## Canonicalization -As mentioned in [RFC 6376 section 3.4](https://tools.ietf.org/html/rfc6376#section-3.4) some mail systems modify e-mail in transit. This type of modification is called canonicalization and is generally used to make things comparable before presenting the email to the signing or verification algorithm. You can imagine that this is important when signing and validating an e-mail; if things change too much this can invalidate a DKIM signature. This al +As mentioned in [RFC 6376 section 3.4](https://tools.ietf.org/html/rfc6376#section-3.4) some mail systems modify e-mail in transit. This type of modification is called canonicalization and is generally used to make things comparable before presenting the email to the signing or verification algorithm. You can imagine that this is important when signing and validating an e-mail; if things change too much this can invalidate a DKIM signature, which also impacts DMARC. DKIM allows you to specify the canonicalization settings by using the "c" tag. Accepted values are "relaxed" and "simple" and since canonicalization exists for both the header and the body of an e-mail, the format used to represent the canonicalization setting is "value/value" for header and body respectively.