I have continuous mail spam from different domains. I tried to block the IPs but can't block the IP range for eg., 54.240.11.24-54.240.11.255.
Please find the screenshot for the emails and let us know the solution as soon as possible.
Authentication Bypass in MailboxImportServlet vulnerability (reminder)
https://blog.zimbra.com/2022/08/authentication-bypass-in-mailboximportservlet-vulnerability/
https://blog.zimbra.com/2022/08/authentication-bypass-in-mailboximportservlet-vulnerability/
DMARC Forensic Report for **domain** from IP
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