Exim - retry time not reached for any host

[Daniel Lysfjord]

On 19.06.2020 17:57, Mike Clarke wrote:
[..]
> So it looks very much like the problem lies somewhere in my system even though there's been no
> changes made recently. I'd appreciate suggestions on how I should go about tracing and fixing the
> cause of this problem.
> 

Have you tried to start exim with "-bd -d+all" to get some debug output?