According to upstream, SPF is supported [1] so it would be great to enable the feature. Thanks.
[1]: https://github.com/Exim/exim/wiki/SPF -- Regards, Dmitry Smirnov GPG key : 4096R/52B6BBD953968D1B --- Your Facebook friends are wrong about the lockdown. A non-hysterics's guide to COVID-19 by Tom Woods. -- https://wrongaboutlockdown.com/
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