I keep getting "Problem during delivery processing" messages

Me too - I'm getting one of these for each mail I receive. Looks like something is screwed up in the iCloud spamsieve.

Ditto. I now get one of these emails whenever I send from my .me account.

Not just me then!! Started happening this morning 😟

I have also been receiving these since 08:00 this morning (8 so far)

I have been seeing this since some time in the early hours UK time as well. I receive the incoming email as normal but then I get the error message as well a few seconds later.

Same problem here. And i can't fine apple support contact for submit this problem. Bad bad bad bad support page appe 😟.

Same here. Happened briefly a few days ago as well (week, week and a half ish)

Same here.

Snap.....sort it out quickly please!

Yes same here too.

Me too! - in UK if it makes a difference!

an me

Same problem here in the UK.

Same problem here in Norway.
Thankfully the original emails is still coming through as well, so nothing lost. But clearly annoying.