Well, the 'English' bit was " emails will de delivered to your recipients' inbox". I have to confess that's a new one to me.
The "what's it all about" bit was to see if anyone knew why I suddenly needed to sign up to some M$ crap as in "Publishing your SPF records and enrolling in our Junk Mail Reporting Program (JMRP) are the two policy requirements of Hotmail." . I had to go to the 'sender ID home page' on 4/4 to which you referred to initiate the SPF change.
Anyway - I got a bit shirty with Carlo (who sent yesterday's message and asked for my inside leg measurement) and asked him, not too politely, to identify the spam in the email they had a copy of. Whether that worked or not I know not, but normal service was resumed yesterday afternoon. So, I am now the proud owner of 2 domains with M$ approved SPF records. Lucky me.
Thanks due also to bushfiva for reminding me of the time scales.I obviously now send emails that 'comply with Windows Live Hotmail's technical standards' so that's a relief. I guess I put this down to a mini Tsunami on Oceanus Gatesicus?
Still puzzled why a 'reverse DNS lookup' is a problem for Bill?