E-mail and spam filtering
I have had a problem for several months where email from subset of my regular correspondents incorrectly is placed in the spam folder. It is a specific list of people and companies whose mail is placed in the spam folder. When I mark it as not spam, it is placed in my inbox, but returns to the spam folder within 10 minutes. I have to move the e-mail to personal folder to keep it out of the spam folder. I have tried turning off spam filtering but it had no effect on these e-mails; they still ended up in the spam folder. It did let true spam into my inbox, so I have turned it back on.