Have you looked at CyaSSL? It supports all current industry standards up to TLS 1.2 (as well as some cool features such as stream ciphers), has an OpenSSL compatibility layer, and focuses on optimizing speed and size.
It's dual licensed under both GPLv2 and a commercial license (if you need support). I recently used it with some Android work I was doing and was very pleased.
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这个答案更适合事后阅读这篇文章的任何人，但它看起来像版本 7.20.0 libcurl< /a> 支持 SMTP，包括 SSL。
看起来 SASL 支持已计划，但可能尚未发布。不过，我确实找到了这个补丁。
This answer is more for anyone reading this post after the fact, but it looks like as of version 7.20.0 libcurl supports SMTP, including SSL.
It looks like SASL support is planned, but maybe not released yet. I did find this patch however.
蒂姆，
你看过 CyaSSL 吗？它支持高达 TLS 1.2 的所有当前行业标准（以及一些很酷的功能，例如流密码），具有 OpenSSL 兼容层，并专注于优化速度和大小。
它拥有 GPLv2 和商业许可证的双重许可（如果您需要支持）。我最近在我正在做的一些 Android 工作中使用了它，并且非常高兴。
http://yassl.com/yaSSL/Products_cyassl.html
问候，
克里斯
Tim,
Have you looked at CyaSSL? It supports all current industry standards up to TLS 1.2 (as well as some cool features such as stream ciphers), has an OpenSSL compatibility layer, and focuses on optimizing speed and size.
It's dual licensed under both GPLv2 and a commercial license (if you need support). I recently used it with some Android work I was doing and was very pleased.
http://yassl.com/yaSSL/Products_cyassl.html
Regards,
Chris