I'm using windows 10, Windows live mail and Virgin Media blueyonder. What are you using?
I'm getting the same problem and it's slowly getting worse. I have sysprem.com and firstname.lastname@example.org in my blocked senders list and I also checked that it hasn't snuck into the safe senders list. VM email@example.com seem incapable of receiving my emails with the message source info as they request but it appears they are only interested in fraudulent VM emails, even though I raised a queery Report ref No 2118637 over spam filtering through my incoming mail server, I have still heard nothing and I'm begining to feel blacklisted by them as a nuicance.
I am trying to find the best free and kept up to date downloadable blacklist at the moment, hopefully somebody from VM might point us in the right direction or offer advice that works.
Edited just to add - there is a free option (see the link to 'Mailwasher Free' at the top of their homepage).
I used it for a long time and found it was excellent. These days I use Gmail which deals with spam very effectively without the need for any add ons.
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Out of interest There are the big boys like invaluement.com, spamhause.org, surbl.org and urible.com. Unfortunately they are not public nor downloadable lists but you can search some for problem domains or ip addresses if your interested. Of all the dozens I've garnered from my spam only 126.96.36.199 showed up, so I guess sysprem id is hidden in Vietnam I think. Thanks for the mailwasher link, will let you know