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generated dkim entry incorrect syntax for sha-256 #620

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Mar 27, 2017
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generated dkim entry incorrect syntax for sha-256 #620

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generated dkim entry incorrect syntax for sha-256
jasonblewis Dec 15, 2016
df4c024
sha256 is case sensitive
jasonblewis Dec 15, 2016
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6 changes: 3 additions & 3 deletions docs/email/postfix/configure-spf-and-dkim-in-postfix-on-debian-8.md
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Original file line number Diff line number Diff line change
Expand Up @@ -289,18 +289,18 @@ As with SPF, DKIM uses TXT records to hold information about the signing key for
{: .file}
example.txt
: ~~~ text
201510._domainkey IN TXT ( "**v=DKIM1; k=rsa; s=email; "
201510._domainkey IN TXT ( "**v=DKIM1; h=rsa-sha256; k=rsa; s=email; "
"p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu5oIUrFDWZK7F4thFxpZa2or6jBEX3cSL6b2TJdPkO5iNn9vHNXhNX31nOefN8FksX94YbLJ8NHcFPbaZTW8R2HthYxRaCyqodxlLHibg8aHdfa+bxKeiI/xABRuAM0WG0JEDSyakMFqIO40ghj/h7DUc/4OXNdeQhrKDTlgf2bd+FjpJ3bNAFcMYa3Oeju33b2Tp+PdtqIwXR"
"ZksfuXh7m30kuyavp3Uaso145DRBaJZA55lNxmHWMgMjO+YjNeuR6j4oQqyGwzPaVcSdOG8Js2mXt+J3Hr+nNmJGxZUUW4Uw5ws08wT9opRgSpn+ThX2d1AgQePpGrWOamC3PdcwIDAQAB**" ) ; ----- DKIM key 201510 for example.com

~~~

The value inside the parentheses is what you want. Select and copy the entire region from (but not including) the double-quote before `v=DKIM1` on up to (but not including) the final double-quote before the closing parentheses. Then edit out the double-quotes within the copied text and the whitespace between them. From the above file the result would be:
The value inside the parentheses is what you want. Select and copy the entire region from (but not including) the double-quote before `v=DKIM1` on up to (but not including) the final double-quote before the closing parentheses. Then edit out the double-quotes within the copied text and the whitespace between them. Also change `h=rsa-sha256` to `h=sha256`. From the above file the result would be:

{: .file-excerpt}
example-copied.txt
: ~~~ text
v=DKIM1; k=rsa; s=email; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu5oIUrFDWZK7F4thFxpZa2or6jBEX3cSL6b2TJdPkO5iNn9vHNXhNX31nOefN8FksX94YbLJ8NHcFPbaZTW8R2HthYxRaCyqodxlLHibg8aHdfa+bxKeiI/xABRuAM0WG0JEDSyakMFqIO40ghj/h7DUc/4OXNdeQhrKDTlgf2bd+FjpJ3bNAFcMYa3Oeju33b2Tp+PdtqIwXRZksfuXh7m30kuyavp3Uaso145DRBaJZA55lNxmHWMgMjO+YjNeuR6j4oQqyGwzPaVcSdOG8Js2mXt+J3Hr+nNmJGxZUUW4Uw5ws08wT9opRgSpn+ThX2d1AgQePpGrWOamC3PdcwIDAQAB
v=DKIM1; h=sha256; k=rsa; s=email; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu5oIUrFDWZK7F4thFxpZa2or6jBEX3cSL6b2TJdPkO5iNn9vHNXhNX31nOefN8FksX94YbLJ8NHcFPbaZTW8R2HthYxRaCyqodxlLHibg8aHdfa+bxKeiI/xABRuAM0WG0JEDSyakMFqIO40ghj/h7DUc/4OXNdeQhrKDTlgf2bd+FjpJ3bNAFcMYa3Oeju33b2Tp+PdtqIwXRZksfuXh7m30kuyavp3Uaso145DRBaJZA55lNxmHWMgMjO+YjNeuR6j4oQqyGwzPaVcSdOG8Js2mXt+J3Hr+nNmJGxZUUW4Uw5ws08wT9opRgSpn+ThX2d1AgQePpGrWOamC3PdcwIDAQAB
~~~

Paste that into the value for the TXT record.
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