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Threat actors are abusing the special-use ".arpa" domain and IPv6 reverse DNS in phishing campaigns that more easily evade domain reputation checks and email security gateways. [...]
A newly discovered botnet of 13,000 MikroTik devices uses a misconfiguration in domain name server records to bypass email protections and deliver malware by spoofing roughly 20,000 web domains. [...]
Hotmail users worldwide have problems sending emails, with messages flagged as spam or not delivered after Microsoft misconfigured the domain's DNS SPF record. [...]