I help manage 220.127.116.11 and noticed we were getting bounced emails because of several blacklists those are:
- Spamhaus ZEN
so I checked the first blacklist here:
and it says "It shows signs of being infected with a spam sending trojan, malicious link or some other form of botnet."
I've run mailq to try and see if we are sending out bad emails on mass but I can't see anything spammy or infected in the queue just some emails that weren't sent because they are being blocked, what can I do to further investigate this?