Email 543 crates

glit-cliCli - Retrieve all mail related to a git repository, user, or organization2,761MIT OR Apache-2.0Command line utilitiesEmail telestesTyped Media (MIME) Types2,756Apache-2.0EmailNetwork programming koibumi-daemon-syncAn experimental Bitmessage client daemon (sync version)2,738AGPL-3.0-or-laterEmailNetwork programming m2syncTool for synchronizing IMAP and local m2dir2,734GPL-3.0-or-laterEmail openpgp-ca-restdOpenPGP CA is a tool for managing and certifying OpenPGP keys2,657GPL-3.0-or-laterCryptographyEmail imap-patch-for-async-imap-liteIMAP client for Rust2,643Apache-2.0/MITEmailNetwork programming email-address-extractorA blazingly fast command line tool written in pure safe Rust to automatically extract email addresses from files in a given path.2,623MITCommand line utilitiesEmail emlxPrse Apple Mail.app emlx files into eml and related metadata.2,489MITEmailParser implementations flux-mailA simple implementation of SMTP Protocol as a temporary mail service in Rust2,487non-standardEmail IMAPServer-cliA cli for the IMAPServer crate2,477GPL-3.0EmailNetwork programming smtp-server-typesTypes required for configuring the smtp-server crate2,414MIT OR Apache-2.0EmailNetwork programming briefa mail library for Rust2,329MITEmail neo-emailThe modern way to build emails services with Rust2,297MITAsynchronousEmail email-validator-rfc5322RFC 5322 compliant email address validator with detailed error reporting2,268MITEmailParser implementations imap_sessionA wrapper around async_imap offering a simpler way to deal with common IMAP operations2,242MITEmailNetwork programming emailxRobust email syntax and deliverability validation.2,216MIT/Apache-2.0Email smtp-queue-typesType definitions for smtp-queue2,191MIT OR Apache-2.0EmailNetwork programming smtp_recvDual-port SMTP server: Secure submission (465) & Inbound forwarding (25) / 双端口 SMTP 服务：安全提交 (465) 与入站转发 (25)2,134MulanPSL-2.0AsynchronousCryptography deadpool_imapA deadpool implementation for IMAP connections. Uses `imap_session` as a backend2,065MITEmailNetwork programming cmail-rpgpOpenPGP implementation in Rust for Cmail2,058MIT OR Apache-2.0CryptographyEmail maildir-packPack maildir into archive files2,019MITCommand line utilitiesEmail mail_structA minimalist Rust email structure library with optional support for encoding, decoding, and sending via SMTP. / 一个极简的 Rust…1,980MulanPSL-2.0Data structuresDevelopment tools simpleiceSchedule emails in case of emergency1,969MITCommand line utilitiesEmail quickmailA fast command-line tool for sending emails1,944MITCommand line utilitiesEmail blake3-powA Proof of Work scheme using the blake3 hash function1,931MIT OR Apache-2.0AuthenticationCryptography lettre-openssl111Temporary release of lettre that works with openssl 1.1.11,861MITEmail multidepartExports HTML emails to folders together with their embedded content.1,855GPL-3.0-or-laterCommand line utilitiesEmail lettre-openssl111_emailTemporary release of lettre_email that works with openssl 1.1.11,833MITEmail postal-rsA libary which provides an API to Postal1,778MITEmail enqueue-emailSend a bookmark via email, enqueuing it with MSMTP queue1,744Apache-2.0 OR MITEmailParsing tools resend-client-rsBasic port of Resend client1,742MITAPI bindingsEmail neverestCLI to synchronize and backup emails1,736MITCommand line utilitiesEmail smtp-clientAsynchronous SMTP client library1,733MIT OR Apache-2.0EmailNetwork programming nebula_emailEmail handler for nebula form-handling server1,713MPL-2.0EmailWeb programming::HTTP server deadpool-lettreThis crate implements a deadpool manager for lettre.1,708MITEmail plunkA fast, simple, and easy-to-work-with Rust SDK for Plunk — send emails without the hassle.1,707MITAPI bindingsAsynchronous on-emailEmail event handler. Subscribe to an email type for an email account and emit matching messages as JSON.1,694MITCommand line utilitiesEmail taxydromosΤΑΧΥΔΡΌΜΟΣ,yet another mail client1,684MITEmail mailpotMailing list manager1,675AGPL-3.0-or-laterCommand line utilitiesData structures vsmtp-plugin-mysqlA plugin for vSMTP that enable support for mysql databases1,664GPL-3.0-onlyDatabase interfacesEmail mfauthSimple CLI client to request and manage OAuth2 tokens1,654MITAuthenticationCommand line utilities vsmtp-plugin-csvA plugin for vSMTP that supports CSV databases1,645GPL-3.0-onlyDatabase interfacesEmail smtp-serverAsynchronous SMTP server library1,639MIT OR Apache-2.0EmailNetwork programming tb-openpgp-certsA tool to interact with TB78 (and later) OpenPGP cert storage1,627GPL-3.0-or-laterCryptographyEmail smtp-dumpReceive-only SMTP server which saves every email that is sent to it1,611Apache-2.0EmailNetwork programming tombatomba: A Rust library for tomba1,584Apache-2.0Email smtp-queueQueue for SMTP messages using smol1,573MIT OR Apache-2.0EmailNetwork programming dexlabDexlab is an automation factory to setup complex pipelines1,573non-standardAsynchronousCommand line utilities wasm-smtpEnvironment-independent SMTP client core for WASM and other constrained runtimes.1,553Apache-2.0EmailNetwork programming jmap-codecjmap-codec1,547EUPL-1.2Email minismtpA minimal asynchronous SMTP server library (MTA) for Rust.1,545MITEmail invoice2storageExtract email attachments and stores them in a different backends like webdav or folder1,541GPL-3.0-or-laterCommand line utilitiesEmail rustymailAn Email Newsletter created with rust axum framework1,521MIT OR Apache-2.0EmailWeb programming ephemeral_emailA Rust library for generating temporary email addresses.1,502MITAPI bindingsEmail mxr-async-imapAsync IMAP client for Rust (mxr fork with ENABLE/NAMESPACE support)1,497MIT OR Apache-2.0EmailNetwork programming gmail-mbox-analyzeranalyze gmail mbox files1,467GPL-3.0-onlyEmail lettermint-rsLettermint email service client1,452MIT OR Apache-2.0API bindingsEmail lkmlProgram to download and assort emails from mailing lists supported by `lei`1,435MIT OR Apache-2.0Command line utilitiesEmail nexo-plugin-emailEmail (IMAP/SMTP) channel plugin for Nexo agents (out-of-tree subprocess).1,412MIT OR Apache-2.0API bindingsEmail vmpCLI tool to quickly pick mails from an m2dir1,406GPL-3.0-or-laterCommand line utilitiesEmail list-unsubscribeParse RFC 2369 List-Unsubscribe and RFC 8058 List-Unsubscribe-Post headers into a typed action enum.1,317MIT OR Apache-2.0EmailParser implementations smtpcSMTPC simplifies process of parsing mail messages sent over SMTP1,312non-standardEmail cascade-emailA simple tool for send various emails using datas from excell1,282MITCommand-line interfaceCommand line utilities loveletter🐟 ← 💌 ← 📬 ← 💌 ← 🦢1,258MIT OR Apache-2.0Command line utilitiesEmail ramonA lightweight server monitoring framework. Send emails when custom conditions are met.1,222MITCommand line utilitiesEmail mailtester_ninjaMailTester Ninja is packed with essential features designed to enhance your email marketing efforts.1,165MITEmail vpgpOpenPGP implementation in Rust by VGISC Labs1,149MIT OR Apache-2.0CryptographyEmail tiny_msgA tiny Outlook Email Message (.msg) reader1,140MITEmailParser implementations mail_forwardA trait to retrieve email forwarding addresses / 获取邮件转发地址的 trait1,129MulanPSL-2.0API bindingsDevelopment tools smtp_sendSMTP email sending library with built-in DKIM signing and MX lookup support. / 支持内置 DKIM 签名和 MX 记录查询的 SMTP 邮件发送库。1,073MulanPSL-2.0AsynchronousCryptography email-componentsComponents for building email templates1,069MIT OR Apache-2.0EmailTemplate engine gmail-mcp-serverA clean, simplified MCP server for Gmail integration built with Rust1,062MITAPI bindingsAuthentication mailmergeMailMerge Rust Crate: work in progress for building a mail merge tool to send emails.983MIT OR Apache-2.0 OR GPL-2.0 OR GPL-3.0 OR AGPL-3.0Command line utilitiesEmail wasm-smtp-tokioTokio + rustls socket adapter for wasm-smtp.972Apache-2.0AsynchronousEmail mail-threadingJWZ email threading (RFC 5256). Reconstruct message threads from References/In-Reply-To headers, with subject fallback for broken…971MIT OR Apache-2.0AlgorithmsEmail stalwart_mta_hook_typesRust type definitions for Stalwart Mail Transfer Agent (MTA) hooks943AGPL-3.0-onlyAPI bindingsEmail rusmes-protoCore protocol types and traits for RusMES — mail addresses, message identifiers, domain types, and the mail state machine927Apache-2.0EmailEncoding inboxAn email client for terminal nerds917MITCommand line utilitiesEmail mailbox-formatsRead and write classic local-mail storage formats: mbox (mboxo/rd/cl/cl2) and Maildir.914MIT OR Apache-2.0EmailFilesystem summer-mailIntegrate lettre into summer-rs to send emails882MITEmail mail-queryParser and typed AST for Gmail-style email search queries. Backend-agnostic.858MIT OR Apache-2.0EmailParser implementations open-pgpImplementation of the IETF OpenPGP standard for secure communication and data encryption.843LGPL-2.0-or-laterAuthenticationCryptography smtp_srvAuto-refreshing SMTPS server powered by Redis / Kvrocks / 基于 Redis / Kvrocks 自动热更新证书的 SMTPS 服务器836MulanPSL-2.0AsynchronousCryptography email-authEmail authentication library: SPF, DKIM, DMARC, ARC, BIMI800MIT OR Apache-2.0AuthenticationEmail mailrs-rfc2047RFC 2047 MIME encoded-word decoder. Decodes =?charset?(B|Q)?text?= subjects + display names to UTF-8. Supports the full WHATWG…796Apache-2.0 OR MITEmailEncoding io-jmapJMAP client library for Rust787MIT OR Apache-2.0API bindingsEmail io-m2dirM2dir client library for Rust776MIT OR Apache-2.0EmailFilesystem MailLaserAn SMTP server that listens for incoming emails addressed to a specific recipient and forwards them as HTTP POST requests to a…769MITEmailNetwork programming mailwebExports HTML emails to folders together with their embedded content.768GPL-3.0-or-laterCommand line utilitiesEmail mailrs-rfc5322Pull-based RFC 5322 message parser — lazy header lookup, byte-level scan, zero-alloc borrowed slices. Skip-ahead to the header…759Apache-2.0 OR MITEmailNo standard library::No dynamic allocation sk_dkimDeterministic DKIM key generation based on secret key / 基于密钥的确定性 DKIM 密钥生成743MulanPSL-2.0AlgorithmsCryptography mailrs-jmapJMAP (RFC 8620 + RFC 8621) server-side dispatcher and method handlers — framework-agnostic, BYO mail store via the MailStore…725Apache-2.0 OR MITAPI bindingsEmail mailrs-smtp-protoSMTP protocol parser, formatter, and session state machine (RFC 5321) — zero I/O, async-runtime-agnostic.715Apache-2.0 OR MITEmailNetwork programming mailnaggertrayTray icon intended for use with mailnagger699MITEmail mailrs-imap-protoIMAP4rev1 protocol parser, response formatter, and sequence-set helpers (RFC 3501) — zero I/O.693Apache-2.0 OR MITEmailNetwork programming io-smtpSMTP client library for Rust676MIT OR Apache-2.0EmailNo standard library mailrs-cleanEmail content cleanup primitives: HTML sanitization, tracking-pixel detection, bulk/automated sender heuristics, quoted-reply…670Apache-2.0 OR MITEmailText processing mailrs-rfc2231RFC 2231 MIME parameter encoder + decoder. Handles non-ASCII filenames in Content-Type / Content-Disposition (e.g.…670Apache-2.0 OR MITEmailEncoding mailrs-mail-builderRFC 5322 / 2046 / 2047 / 2231 outbound mail builder. Constructs canonically-compliant raw bytes for plain-text,…668Apache-2.0 OR MITEmailEncoding mailrs-inboundComposable SMTP receive pipeline framework — Stage trait + early-reject executor + pure decision logic + RFC 8601…666Apache-2.0 OR MITAPI bindingsEmail mailrs-tls-rptRFC 8460 SMTP TLS Reporting (TLSRPT) — _smtp._tls TXT record parser, RFC 8460 §4 JSON report data model, FailureType enum (14…656Apache-2.0 OR MITEmailNetwork programming rusmes-storageStorage abstraction layer for RusMES — trait-based mailbox and message store with filesystem (maildir), PostgreSQL, and AmateRS…655Apache-2.0AsynchronousEmail mailrs-dnsblRFC 5782 DNS-based blocklist lookup. Reverse-IPv4 + zone query + Spamhaus return-code interpretation + in-process TTL cache…649Apache-2.0 OR MITEmailNetwork programming cloudillo-emailEmail notification system for Cloudillo with Handlebars templates and SMTP delivery647LGPL-3.0-onlyEmailWeb programming mailrs-smtp-codecTokio Decoder/Encoder for the RFC 5321 SMTP wire format — switches between line-oriented command mode (CRLF-terminated, ≤1024…640Apache-2.0 OR MITAsynchronousEmail kudi_sdkA lightweight and developer-friendly Rust SDK for Kudi, designed to simplify SMS delivery with speed and reliability.635MITAPI bindingsDevelopment tools mailrs-srsSender Rewriting Scheme (SRS, RFC-style) — rewrite envelope From for SPF-aware mail forwarding, with HMAC-keyed signature and…634Apache-2.0 OR MITEmailNetwork programming mailrs-imap-codecTokio Decoder/Encoder for the RFC 9051 IMAP wire format — handles both line mode (CRLF-terminated commands and responses) and…632Apache-2.0 OR MITAsynchronousEmail mailrs-attachment-extractExtract text from email attachments (PDF + image OCR). PDF text via `pdf-extract` (pure Rust); OCR via the `tesseract` CLI…629Apache-2.0 OR MITEmailFilesystem mailrs-imap-formatIMAP wire-format helpers (RFC 9051): FLAGS / INTERNALDATE / quoted string / address structures / BODY[…] section extraction /…626Apache-2.0 OR MITEmailEncoding lettermintLettermint email service client622MIT OR Apache-2.0API bindingsEmail mailrs-clamavAsync ClamAV (clamd) TCP client. Implements the INSTREAM protocol for malware scanning, plus PING and VERSION commands.…618Apache-2.0 OR MITEmailNetwork programming mailrs-arfRFC 5965 Abuse Reporting Format (ARF / feedback-report) parser. Extracts Feedback-Type, original recipient, source IP, and other…617Apache-2.0 OR MITEmailParser implementations ferrum-email-coreCore types, traits, and node tree for the Ferrum Email framework582MIT OR Apache-2.0EmailWeb programming koda-emailMCP server for email read/send/search via IMAP/SMTP — part of the koda ecosystem572MITCommand line utilitiesEmail rusmes-authPluggable authentication backends for RusMES — File, LDAP, SQL, OAuth2/OIDC, System, and SASL…572Apache-2.0AsynchronousEmail rusmes-configConfiguration management for RusMES — TOML/YAML auto-detection, 30+ environment variable overrides, validation, and SIGHUP…569Apache-2.0EmailEncoding correlatecorrelate is a standalone server that listens for Stripe webhook events and sends notification emails about successful orders.568MITEmailWeb programming::HTTP server email_syntax_verify_optUltra-fast, zero-allocation email validation library optimized for enterprise production use558MIT OR Apache-2.0EmailNo standard library email-validatorAn email syntax validator531CC0-1.0EmailNo standard library laneful-rsRust SDK for Laneful email sending API528MITAPI bindingsEmail oxidite-mailEmail sending for Oxidite with SMTP support526MITEmailWeb programming wasm-smtp-cloudflareCloudflare Workers socket adapter for wasm-smtp.521Apache-2.0EmailNetwork programming mini-mail-authA minimal DKIM signing library for Rust, for those who just need to sign an email.520Apache-2.0 OR MITAuthenticationEmail disposable-emailsFast, zero-allocation disposable / temporary email domain detection with an embedded 72k-domain blocklist.510Apache-2.0 OR MITData structuresEmail email-extractIntelligent email parsing with structured type extraction488MITEmailParser implementations polymailUnified email sending interface for multiple providers467MIT OR Apache-2.0API bindingsEmail notmuch-tagrewriterRetag notmuch mails465GPL-3.0-or-laterCommand line utilitiesEmail smtpdAsynchronous, extensible SMTP server library built on Tokio459MIT OR Apache-2.0AsynchronousEmail rusmes-metricsObservability layer for RusMES — Prometheus metrics, OpenTelemetry OTLP tracing, structured logging, health/readiness/liveness…445Apache-2.0AsynchronousEmail pidge-coreCore types for the pidge CLI: accounts, configuration, normalized message model443MITCommand line utilitiesEmail ferrum-email-renderRendering engine for Ferrum Email — Node tree to HTML, plain text, and CSS inlining441MIT OR Apache-2.0EmailWeb programming email-messageTyped outbound email message and address model439MITAsynchronousEmail mailguard-rsA fast temporary email and malicious domain detection library using SURBL DNS queries429Apache-2.0EmailNetwork programming io-imapIMAP client library for Rust403MIT OR Apache-2.0EmailNo standard library cealOpportunistic E-Mail Encryption - Stand-Alone Library and Extensions for Lettre383EPL-2.0CryptographyEmail mime-treeRFC 5322/MIME parser producing a byte-range-indexed part tree379MIT OR Apache-2.0EmailEncoding missiveCompose, deliver, preview, and test emails in Rust - pluggable providers with zero configuration code374MITEmailWeb programming io-maildirMaildir client library for Rust374MIT OR Apache-2.0EmailFilesystem pulldown-cmark-to-flowedConvert Markdown to Plain Text with format=flowed369EUPL-1.2EmailText processing pidge-clientMicrosoft 365 / Graph client and OAuth flows for the pidge CLI368MITAuthenticationCommand line utilities direct_to_mxDirect-to-MX email delivery with DKIM signing, IPv4 forcing, MX fallback, bulk sending, attachments, DKIM key generation, and DNS…359MITEmailNetwork programming mailledger-oauthOAuth2 authentication library for email protocols357MITAuthenticationEmail langmailEmail preprocessing for LLMs353MIT OR Apache-2.0EmailText processing nexo-email-probeIMAP/SMTP probe + provider hints + SPF/DKIM alignment check, framework-agnostic.350MIT OR Apache-2.0API bindingsEmail rusmes-coreMailet processing engine for RusMES — composable mail processing pipeline with matchers, mailets, DKIM/SPF/DMARC, spam filtering,…327Apache-2.0AsynchronousEmail usesend-apiLow-level typed API client for useSend — an open-source Resend alternative321MIT OR Apache-2.0API bindingsEmail ferrum-email-sendEmail provider abstraction and sending API for Ferrum Email315MIT OR Apache-2.0EmailWeb programming yencodingyEnc encoding and decoding for Usenet binary posts305MIT OR Apache-2.0EmailEncoding imap-rs-coreZero-copy IMAP4rev2 protocol types and parser (no I/O). Core of the imap-rs library.301MITEmailNetwork programming ferrum-email-componentsStandard component library for Ferrum Email — Html, Body, Button, Text, and more299MIT OR Apache-2.0EmailWeb programming email-transportTransport abstraction for outbound email288MITAsynchronousEmail uuencodingUUencoding and UUdecoding — encode, decode, and scan for UU blocks285MIT OR Apache-2.0EmailEncoding mailledger-imapProduction-quality IMAP client library implementing RFC 9051 (IMAP4rev2)280MITAsynchronousEmail pidgeA fast CLI for e-mail and calendar280MITCommand line utilitiesEmail mailrs-dkimRFC 6376 DKIM signature verifier + signer. Parses DKIM-Signature headers, applies simple/relaxed canonicalization, verifies…276Apache-2.0 OR MITCryptographyEmail usesendErgonomic Rust SDK for useSend — an open-source Resend alternative249MIT OR Apache-2.0API bindingsEmail email-cliAgent-friendly email CLI for Resend249MITCommand line utilitiesEmail jmap-mail-typesRFC 8621 JMAP for Mail data types (Mailbox, Thread, Email, Identity, EmailSubmission, SearchSnippet)245MIT OR Apache-2.0EmailEncoding dmarc-report-parserAn RFC 7489-compliant DMARC aggregate report parser235MITEmailParser implementations mailledger-mimeMIME message parsing and generation library for email232MITEmailEncoding mailledger-smtpProduction-quality SMTP client library implementing RFC 5321231MITEmailNetwork programming rusmes-jmapJMAP server for RusMES — RFC 8620/8621 HTTP/JSON mail API with Email, Mailbox, Thread, Blob, EventSource push, and…230Apache-2.0AsynchronousEmail imap-rs-tlsrustls-based secure transport (TLS and STARTTLS) for imap-rs. No OpenSSL, no native-tls.227MITEmailNetwork programming rusmes-smtpAsync SMTP server for RusMES — RFC 5321 compliant with STARTTLS, AUTH (PLAIN/LOGIN/CRAM-MD5/SCRAM-SHA-256), PIPELINING, DSN, and…226Apache-2.0AsynchronousEmail rusmes-imapAsync IMAP4rev2 server for RusMES — RFC 9051 compliant with CONDSTORE, QRESYNC, UIDPLUS, MOVE, IDLE, NAMESPACE, and SPECIAL-USE…223Apache-2.0AsynchronousEmail mime-meta-languageCLI and lib for the Emacs MIME message Meta Language (MML)215MIT OR Apache-2.0Command line utilitiesEmail mailrs-shieldSMTP anti-spam primitives: DNS blocklist (DNSBL) queries, greylisting policy with optional in-process kevy store, and PTR /…214Apache-2.0 OR MITEmailNetwork programming imap-rs-clientAsync IMAP session state machine, command pipelining, and credential management. Client layer of imap-rs.206MITEmailNetwork programming io-emailEmail client library204MIT OR Apache-2.0API bindingsEmail email-message-wireRFC822/MIME wire parsing and rendering for email-message197MITEmailEncoding esp-idf-smtpLightweight SMTP client over esp_tls for esp-idf-svc in Rust195MPL-2.0EmailEmbedded development tempmail-sdk临时邮箱 SDK，所有渠道返回统一标准化格式194GPL-3.0API bindingsEmail mailrs-mta-stsRFC 8461 MTA Strict Transport Security (MTA-STS) — policy + STS record parsers, MX pattern matching, enforce(policy, mx)…191Apache-2.0 OR MITEmailNetwork programming manteauErgonomically build and send emails with Rust, using one of our supported providers or providing your own.190MIT OR Apache-2.0EmailTemplate engine imap-rsA high-security, memory-safe, and async-native IMAP library for Rust.190MITEmailNetwork programming mailrs-smtp-clientOutbound SMTP client: MX resolution, DANE/STARTTLS, response parsing — async, transport-agnostic primitives for RFC 5321 senders.186Apache-2.0 OR MITAsynchronousEmail i18n-md-email-templatesRender localized, markdown-authored transactional emails (subject + styled HTML + plaintext) from i18n string catalogs185LGPL-3.0-or-laterEmailInternationalization (i18n) mailrs-maildirMaildir filesystem-format primitives: atomic delivery, directory scans, flag parsing — no IMAP/POP3 layer.179Apache-2.0 OR MITEmailFilesystem ffrelay-apiRust API client library for Firefox Relay email forwarding service178MIT OR Apache-2.0API bindingsEmail daaki-messageRFC 5322 email message parser and builder178MITEmailParser implementations mailrs-intelligenceLLM-powered email analysis primitives: structured extraction, importance scoring, spam classification, and embeddings — with a…176Apache-2.0 OR MITAsynchronousEmail gatekpr-emailEmail notification service for Gatekpr SaaS171MITEmail wangamail-rsSend email via Microsoft Graph API using app registration (client credentials)169MIT OR Apache-2.0EmailWeb programming::HTTP client sendkitRust SDK for the SendKit email API166MITAPI bindingsEmail mailrs-outbound-queueOutbound mail queue primitives: DKIM signing, DSN generation, MTA-STS lookup, retry/backoff, with a pluggable store trait and a…166Apache-2.0 OR MITAsynchronousEmail keplarsOfficial Rust SDK for Keplars Email API158MITAPI bindingsEmail mailkit-rsSafe Rust bindings for Apple's MailKit framework on macOS156MIT OR Apache-2.0API bindingsEmail quarb-imapIMAP mailbox adapter for the Quarb query engine156MIT OR Apache-2.0Email smtp-test-toolCross-platform SMTP / IMAP / POP3 connectivity tester with IT-actionable diagnostics.155MIT OR Apache-2.0Command line utilitiesEmail simplemailclientA simple terminal mail client (SMTP send, IMAP fetch) with a TUI.153MITCommand line utilitiesEmail mailing-list-cliNewsletter and mailing list management from the terminal. Built for AI agents on top of email-cli.149MITCommand line utilitiesEmail quarb-maildirMaildir and mbox adapter for the Quarb query engine149MIT OR Apache-2.0Email smime-treeS/MIME sign/verify/encrypt/decrypt via key traits149MIT OR Apache-2.0CryptographyEmail yopmail-clientUnofficial async client for YOPmail: list inboxes, fetch (HTML/raw), send, attachments147MITEmail agentmailIMAP email client, MCP server, and CLI — read, search, delete, unsubscribe, and manage mailboxes146Apache-2.0EmailNetwork programming io-msgraphMicrosoft Graph API client library for Rust146MIT OR Apache-2.0API bindingsEmail email_address_validatorA simple email address parsing library146MPL-2.0EmailParsing tools leptos-hl-contactA reusable, secure contact form plugin for Leptos v0.8 with pluggable delivery backends.144Apache-2.0EmailWeb programming mailtrapAn unofficial library for interacting with the Mailtrap API143MITEmail