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Environment: Personal Mail Server (ie, private machine at my personal business)
Environment: Public DNS Server (ie, I use my registrar's interface)
Configuration Part 1: Created a DKIM Record from my Personal Mail Server
Configuration Part 2: Loaded the DKIM Record onto my registrar's Public DNS Server

Problem: Google's MX Toolbox Throws an Error Message
Google Error Message: "Invalid Format of DKIM Record"

DKIM Record ≈ "p=DKIM1; p=blahblahblahMahMahMah;"

Attempt A: Breaking the "p" tag into smaller, space-delimited chunks (each ≤ 256 characters)
Attempt B: Wrapping the tags in double-quotes
Attempt C: Using various encryption methods (ie, 512-bit vs 2048-bit, etc.)
Attempt D: A combination of attempts A-C

May you please tell me how I can resolve the error message that Google's MX Toolbox throws when analyzing my DKIM Record?

Thanks!

Elias

Sidenote: other MX tools don't have any issue with my DKIM Record (eg, MXToolbox.com)

Elias
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1 Answers1

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Solution

Add the K tag

DKIM Record ≈ "p=DKIM1; k=rsa; p=blahblahblahMahMahMah;"

or

DKIM Record ≈ "p=DKIM1; k=rsasha; p=blahblahblahMahMahMah;"

Apparently, Google's current MX Toolbox does not automatically use a k tag as a default. Therefore, you must ensure your TXT record has it.

Good news: You no longer have to space-delimit the p tag to satisfy Google's MX Toolbox.

Elias
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