We have confirmed that our DNS is fine, and we have begun sending emails to another ISP.
DKIM SIGNATURE BODY HASH NOT VERIFIED VERIFICATION
My emails are now signed but I see a body hash verification failure error when viewing message headers We switch our production systems to use the new SES account and everything is going great… except that a number of our emails are displaying a very unusual signature invalidation message. If we see these kinds of errors appearing across all of the ISPs, we may want to confirm with our DNS provider whether our servers are constantly up, and serving correct results to all requests.įor this scenario, let’s assume that we have confirmed that our DNS is fine, and, after waiting a while, we’re no longer seeing any DNS validation errors with any ISP. If they regularly validate DKIM, it could be a problem with that specific ISP’s DNS resolver setup. What we can do is send test emails to other major ISPs. If only one ISP shows DKIM validation failures, that specific ISP could be having some trouble retrieving DNS records.įor our scenario, let’s suppose that half of our emails going to a certain ISP showed this header in our email client::Īuthentication-Results: spf=pass (sender IP is 199.255.192.105) dkim=temperror header.d= x-hmca=none Next, we can try sending emails to addresses belonging to different ISPs. The first thing to do is to confirm that our DNS is properly set up (see previous blog post). These could be due to a DNS glitch causing problems retrieving the public key record. Occasionally, temporary DKIM validation errors by ISPs can appear, such as dkim=temperror.
We see a dkim=temperror message in our inbox. But we cannot rejoice yet, because it looks like our hard-earned signature is not validating. My emails are now signed but I see a DNS validation error when viewing message headersįinally, the so-far elusive DKIM-Signature header appears in our outgoing emails. This is when the next problem manifests itself: the DKIM signature we’ve worked so hard for is invalid. We have begun the task of setting up DKIM for a domain and overcome a great variety of DNS issues, to succeed in getting the signature to appear in our emails. Hello and welcome to the fifth entry in the Amazon SES DKIM troubleshooting blog series.
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