On Wed, 5 Oct 2022, Dave Mal via Exim-users wrote: Hi Dave!
When I look up the DNS results myself the DKIM for this ( s1._domainkey.sendgrid.com ) is actually a CNAME to s1.domainkey.u7715623.wl124.sendgrid.net.
That could be the cause. Based on RFC6376 only the TXT RR is defined for providing the key. However, some admins use a CNAME RR as pointer to the key (might be required by a cloud service to make DKIM work). This is one of those annoying cases of how to interpret the RFC.
ciao Markus -- / Markus Reschke \ \ madi...@theca-tabellaria.de / -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
