Email keeps going to junk folder even after I say it's safe.

This worked for me. My email address in Outlook is set up through my local ISP. Example (@localISP.com), not Google or other well known email providers. What I discovered is that my local ISP must have turned on a filter at some time and what got filtered their was filtering the same way in Outlook. I logged in to the local ISP email panel and checked the filtering and sure enough it was filtering emails. I turned it off so nothing gets filtered and Outlook is now back to normal.

Hope this helps

One solution suggested online (and I believe from Microsoft) is that there have been repeated security issues connected to emails from the affected sender(s).

If this is the case, why do I receive 5 emails from a single Sender (i.e. same email address) but 3 go to Junk and 2 go to Inbox.

I mark the 3 in Junk as 'Not Junk' and they go to Inbox. Within a minute they are back in Junk, whereas those delivered direct to the Inbox remain there.

I see no logic in suggesting the Sender has 'bad form' when emails from that Sender are treated inconsistently.

Basic logic suggests it is a MICROSOFT PROBLEM and there is no evidence to suggest any resources are being directed to validating / disproving that logic or solving it.

Not happy at all.

I have this too! It is so frustrating and there is no fix.

there is no junk drop[down menu under home in new outlook!

I've had several sessions with Microsoft's support agents now (the case was escalated to their level 2 engineers) and their conclusion is that the sender, in my case has a SCL value of 5. If anyone's got a spam rate with that number, their messages will be treated as junk as long as they don't improve their reputation... And what sucks is that personal whitelisting makes no effect if the SCL value is that high (or higher).

I don't think that this is a satisfying solution, but it is what it is and perhaps it might be an explanation to those who wonders...

*Hopefully Microsoft realises that this is not a user friendly approach if everyone with this problem sends them feedback (which is easily done under the Help menu at outlook.com).