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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!
eg,:
dig +short aaisp1._domainkey.testing.me.uk TXT
It should give an answer starting v=DKIM1; if no answer, then it isn't working...
Also try an online tool such as https://mxtoolbox.com/dkim.aspx (there are many others!)
== Testing if signing is working ==
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