On Tue, Feb 27, 2024, Matt Palmer via mailop wrote:

> >     550-5.7.26  DKIM = did not pass 550-5.7.26  SPF [nagler.me] with ip:

> Any chance of a transient/intermittent DNS failure on nagler.me?  On

That should not result in a permanent (550) error but
just cause a temporary (4xy) error.

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