Top Deliverability’s Blog
DMARCIAN: Resolving DKIM Signature Verification Failures Due to Canonicalization Issues
- February 21, 2024
- Posted by: Top Deliverability
- Category: DMARC DMARCIAN Email Authentication Email Services Industry News
DMARCIAN just released another interesting write-up:
DomainKeys Identified Mail (DKIM) is an email security standard designed to help prevent email spoofing. It works by adding a “tamper-proof” seal to email messages, ensuring their authenticity and integrity. However, sometimes legitimate emails fail DKIM signature verification due to canonicalization issues, leading to email delivery problems. This article explains how to resolve these issues by adjusting DKIM canonicalization settings on your email gateway systems. Below is a representation of how DKIM works in an email infrastructure: Video: DKIM Overview Here’s a brief DKIM overview to help you understand its role in email authentication and DMARC. Understanding DKIM Canonicalization Canonicalization in DKIM refers to the method used to prepare an email’s header and body for signing. According to RFC 6376 Section 3.4, there are two canonicalization algorithms for header and body: simple and relaxed. The choice between these settings affects how strictly the email’s content must match the sending and
Read more here: Resolving DKIM Signature Verification Failures Due to Canonicalization Issues
P.S. Do you need help with Email Authentication? Ask for a Consultation
Leave a Reply Cancel reply
Email Service Providers Handbook
The most comprehensive “Handbook of Email Service Providers“!
SPAMASSASSIN RULES
All SpamAssassin rules in one place, EXPLAINED!
SMTP COMMANDS
& REPLY CODES
All SMTP/ESMTP commands and reply codes in one place, EXPLAINED!
Free DNS Tool
Check the DNS records of your domain with our free DNS tool.
Deliverability Glossary
The most comprehensive Email Deliverability and Marketing Glossary!