Wasted years of spam free service and a fair bit of work
I have a system of a different mailbox for every company i register with online. I then blacklist all other addresses to my account. Using this method I have been spam free for some time, and can also catch out companies illegally selling on my address and make serious complaints. This has all been ruined by this fiasco.
Each of my mailboxes have received the same amount of spam so I have been absolutely bombarded. It is relatively quick to set up a mailbox when registering with a service online, but the collective time for all added together probably amounts to hours of work to put this right!
I'm going to look for a different provider...