DNS for DKIM not work

I was installed DKIM on my server. I was tested it with two domain.
1. thietkehay.com used DNS on this server.
2. iti.vn used DNS on other server
I have add an DNS record for domain thietkehay.com:

iti._domainkey.thietkehay.com. TXT "v=DKIM1; k=rsa; p=xxxxxxxxxx"

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after, i test on http://dkimcore.org/c/keycheck . It's not work

DNS query failed for 'iti._domainkey.thietkehay.com':NXDOMAIN

A public-key (p=) is required

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I continue testing with domain iti.vn . i have add DNS record:

iti._domainkey.iti.vn. TXT "v=DKIM1; k=rsa; p=xxxxxxxxxx"

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Test on http://dkimcore.org/c/keycheck. It's ok.

What the happen for DNS on DriectAdmin ? Pls, hekp me.

did you try to do a dig to get all the records for thietkehay.com ?

truenegative said:

did you try to do a dig to get all the records for thietkehay.com ?

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I actually did that when I first saw this thread, to me they look like they are both similar/correct.