DKIM is not Optimal

Question asked by Michael Luer - 5/24/2019 at 9:57 PM

Answered

It passes the test with caveat saying " DKIM is not Optimal" It seems to be causing a few failures in delivery.

Result
DKIM Syntax Check	The record is not optimal	More Info
DNS Record Published	DNS Record found
DKIM Record Published	DKIM Record found
DKIM Public Key Check	Public key is present

What is not optimal, I used the dkim generator for the domain. I also used 2048. not sure whats going on.

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Michael Luer Replied

5/24/2019 at 10:12 PM

Version

The DKIM record version.

Missing from public DNS record

I only put in what was generated.. what is it missing ?

Michael Luer Replied

5/24/2019 at 11:45 PM

Marked As Answer

ok figured it out. I had to add v=DKIM1; to the front of the key to be compliant now. the dkim generated by smartermail didn't generate what version of the record it was just they key.

so once I put the v=DKIM1; in front of the p=jflsjfl jsdklfj as;fj adsklfj kadslfj klasdfj kladalks Key

v=DKIM1; p=jskldfjasjkflsdjflsdjfklsdjfklsdjfkfjsdkljfsdYOURKEY just like that.

It stopped complaining about not being optimal.

Pascale Guilbault Replied

9/26/2019 at 10:28 AM

YESSSS. Thank you, that work for me to!!

Scarab Replied

9/26/2019 at 12:59 PM

Michael,

You might also want to add the k=rsa; flag as well, so that your entire key reads in DNS as:

"v=DKIM1; k=rsa; p=yourDKIMkeyfromsmartermail"

Michael Muller Replied

9/30/2019 at 1:02 PM

To compound the issue, that pop-window shows [random-key]._domainKey.[domain].com WITHOUT the trailing period, without which the world will append the domain name, again.

If you're going to include the domain name in the DKIM in your DNS, it needs to be followed by a period, or the assumption is it's short-hand.

[random-key]._domainKey (short hand, assumes domain name will be appended)

[random-key]._domainKey.[domain].com. (long-hand, complete DKIM declaration, note the trailing period)

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