Without knowing what domain it is you're asking about, it is very hard to tell!

Off the top of my head, DKIM signature verification failed suggests that qmail is signing your mails with the wrong certificate? Is the qmail install new, where maybe there are new signature keys that are not published in the DNS for the domain you're sending email from, or something with a subdomain where you have a key for domain.com but are signing with a key from mail.domain.com?



On 9/12/21 12:35 PM, Remo Mattei wrote:
X-IOL-DKIM: fail="signature verification failed”

I am getting this on the remote box, Any suggestions on this?

Thanks

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