That’s it, thank you so much!
Do I mark this thread as ‘solved’ somewhere?
Thanks for the quick reply!
– where do I check the ‘to’ email? The email address in my MC profile is correct, if that’s what you mean
– as for the SPF records: I don’t know! After checking MC support, I did add the CNAME records to my domain at the hosting provider. They haven’t been checked yet.