I tried to setup DKIM with no success.
1. I used (on my local Linux box) openssl to generate a 1024bit RSA key pair.
2. I added the public key into DNS and let it propagate (for the moment with testing mode "t=y" )
$ host -t txt testing._domainkey.mydomain.example 8.8.8.8
Using domain server:
Name: 8.8.8.8
Address: 8.8.8.8#53
Aliases:testing._domainkey.mydomain.example descriptive text "v=DKIM1;k=rsa;t=y;p=MIGfMA0......DwIDAQAB"
3. I configured the UTM as follows
Priate key =
-----BEGIN PRIVATE KEY-----
MIIC...
...
...
...
-----END PRIVATE KEY-----
selector = testing
DKIM-Domains = mydomain.example
4. I used https://www.appmaildev.com/en/dkim to check. Result: DKIM-Result: none (no signature)
Why is no signature added?
According to the result at the receiving end, the mail is from the specified DKIM domain:
From: "Real Name" <username@domain.example>
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