You can use the same dkim keys but need to sign them in the outgoing end. The receiving end does not use the domain part of the from email addresses to fetch dkim keys, it uses the
On 22 Jul 2024, at 16:40, Marc <Marc@xxxxxxxxxxxxxxxxx> wrote:
I think some dkim testers are updated and more strict because all of a sudden I am confrontend with this.
"DKIM domain does not align with RFC5322.From domain (a.com != b.com). Alignment mode: relaxed."
I was thinking of
- keeping a default provider sign domain to sign messages smtp.example.com for a.com, b.com, c.com
- then cname dkim txt from a.com to _domainkey.example.com
- test in mailfromd if for the current outgoing mail domain a.com a _domainkey.a.com exists, if so change the default sign domain to a.com
I don't really feel like creating for every domain customizations to enable dkim. Anyone can advise on how to deal with this? Is it possible to remove the alignment mode?
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