Slightly OT: Spam being sent from my domain or just backscatter?
Bear with me this OT issue. I share the issue here because I trust most of the regular people here.
Starting this morning, I began to get thousands of bounce messages.
Apparently, spam was being sent from my domain.
I understand that most of these issues are just backscatter, but judging from the headers of the bounce messages I cannot be sure.
Thus, my question: can you tell if this is just backscatter or if my domain account was hijacked? Thanks in advance.
Below there is an anonymized bounce message.
Key: myhosting.com = my hosting provider
mydomain.org = my domain name
Try to pinpoint which IP address they are originating from first.
Set SPF records on your domain to reduce abuse by spammers as a MAIL FROM.
Use DNSBLs like backscatterer.org and reject mails with empty MAIL FROM from these servers.
Thanks for all the answers. Spam was being set indeed from my hosting site. The issue: a very old WordPress theme. So, do not only check you WordPress install proper; check also your themes and plugins. Marking thread as solved.
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