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Stalwart mail-parser

No phone app

5.1No. 17 of 22
in Email Parsing Software
  • Recognised40% of the score27
  • Phone app26% of the score0
  • Documented20% of the score19
  • Free plan14% of the score30
Free plan
Yes
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Summary

Stalwart mail-parser is ranked #17 of 22 in email parsing software on Samsung Mobile US Press. There is a free plan.

Stalwart mail-parser plans and pricing

All plans
Open-source library Free Rust email parsing library · MIT or Apache-2.0 license github.com · 4 Oct 2026

Compared on email parsing software

Attachment parsing
Yesgithub.com

Facts

What it does
mail-parser is an email parsing library written in Rust that supports Internet Message Format (RFC 5322), MIME (RFC 2045–2049), and other internet messaging RFCs.github.com · 4 Oct 2026
Robust parsing
The library aims to parse non-conformant email messages when they do not deviate too far from the standard.github.com · 4 Oct 2026
Message content
It provides a MIME tree and lists of text bodies, HTML bodies, and attachments; it can convert HTML to plain text and plain text to HTML when an alternative is absent.github.com · 4 Oct 2026
Performance design
It uses SIMD kernels on supported targets and defers transfer decoding and charset conversion until content is read.github.com · 4 Oct 2026
Memory use
The README says practically all strings returned by the library reference the raw input message.github.com · 4 Oct 2026
Charsets
The library recognizes WHATWG encoding labels, and its optional full_encoding feature adds support for legacy multibyte character sets including Shift_JIS, Big5, and GB18030.github.com · 4 Oct 2026
Parser limits
Defaults include a nesting depth of 64, up to 10,000 MIME parts, and up to 3 levels of decoded nested messages.github.com · 4 Oct 2026
Security testing
The project says every library function has been fuzzed and tested with MIRI.github.com · 4 Oct 2026
Production use
The README says mail-parser is used in production environments worldwide by Stalwart Mail Server.github.com · 4 Oct 2026
Not a message builder
The library does not build email messages; the README points to the separate mail-builder crate for that functionality.github.com · 4 Oct 2026
Optional features
No Cargo feature is enabled by default; the optional serde feature adds serialization support for Message and related types.github.com · 4 Oct 2026
Rust requirement
The minimum supported Rust version is 1.98.github.com · 4 Oct 2026
License
The library is available under either the MIT License or Apache License 2.0, at the user's option.github.com · 4 Oct 2026

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