January 20, 2026—Cloud Email Gateway
Protection now supports IPv6 for outbound email traffic, expanding compatibility with modern
email platforms such as Microsoft 365 and Gmail. This enhancement applies exclusively
to the outbound direction and includes both outbound email delivery over IPv6 and
IPv6-based email reception from user-defined mail servers. Administrators can configure
IPv6 addresses for user-defined mail servers, and outbound policy rules using Deliver Now can route messages to IPv6 destinations. This update improves interoperability in
IPv6-enabled environments and helps ensure reliable outbound mail flow.
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