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Aspose.Email for C++ 25.1 introduces enhanced control over EML message structure through customizable MIME boundary string templates. With the addition of the BoundariesTemplate property in EmlSaveOptions, developers can now generate structured and consistent boundary strings tailored to specific system or compliance needs. This update is fully supported on Windows, Linux, and macOS.
BoundariesTemplate
EmlSaveOptions
EmlSaveOptions::BoundariesTemplate
{#}
Example: Use boundary--{#} to auto-generate structured part boundaries like boundary--1, boundary--2 within EML files.
boundary--{#}
boundary--1
boundary--2
This new feature works consistently across Windows, Linux, and macOS, giving developers platform-agnostic control over MIME formatting.
custom MIME boundary | EmlSaveOptions C++ | MIME boundary C++ | Aspose.Email EML format
custom MIME boundary
EmlSaveOptions C++
MIME boundary C++
Aspose.Email EML format