Rust Complete solution Projects
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stalwart
All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).
Project mention: The Email Startup Graveyard: Why 80%+ of Email Companies Fail | news.ycombinator.com | 2025-06-30[2] https://github.com/stalwartlabs/stalwart
> It DOES have delivery tracking. Spam filtering is not a protocol feature and it shouldn't be. I suggest you again to educate yourself.
SMTP have extension for DSNs (Delivery Status Notifications) but crucially it does not provide information if email was classified as spam. This is a reason why many website registration form have “check spam folder”. SMTP deliverability is a hard problem both on protocol level and infrastructure on spam filtering.
> If you don't know how to build something doesn't mean it's left out to "hardcore graybeards". You got to admit you just don't know how and either learn or surrender to companies who know, offering the same for a buck. It's pretty simple.
I spend a significant amount of time investigating feasibility of building an email product and build some libraries for email protocols. It is not just my opinion but other HNs users including OP. Search HN for "self hosting email" others people experience.
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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# | Project | Stars |
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1 | stalwart | 9,016 |