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 esmtp.email
MTA-STS Validator
| | www.hardenize.com
Introducing MTA Strict Transport Security (MTA-STS) | Hardenize Blog
2.1 parsecs away

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| | MTA-STS (full name SMTP Mail Transfer Agent Strict Transport Security) is a new standard that aims to improve the security of SMTP by enabling domain names to opt into strict transport layer security mode that requires authentication (valid public certificates) and encryption (TLS).
| | words.filippo.io
The sad state of SMTP encryption
4.3 parsecs away

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| | aykevl.nl
Ayke van Laethem - Enforced STARTTLS for SMTP
2.4 parsecs away

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| | While STARTTLS has traditionally been very sensitive to downgrade attacks, there are now two protocols to fix this: DANE and MTA-STS. I will take a look at how they work and how they can be implemented on your own domain.
| | www.shuttle.dev
Building a Rust API with Claude Sonnet 4.5 | Shuttle
19.6 parsecs away

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| Putting Anthropic's bold claim to the test by building a Rust API from scratch with Sonnet 4.5