Open Source Libraries

PHPMailer – A full-featured email creation and transfer class for PHP. Support for UTF-8 content and 8bit, base64, binary, and quoted-printable encodings. SMTP authentication with LOGIN, PLAIN, CRAM-MD5, and XOAUTH2 mechanisms over SMTPS and SMTP+STARTTLS transports. Validates email addresses automatically. Many PHP developers need to send email from their code. The only PHP function that supports this directly is mail(). However, it does not provide any assistance for making use of popular features such as encryption, authentication, HTML messages, and attachments. Formatting email correctly is surprisingly difficult. There are myriad overlapping (and conflicting) standards, requiring tight adherence to horribly complicated formatting and encoding rules – the vast majority of code that you'll find online that uses the mail() function directly is just plain wrong, if not unsafe!

Open source DKIM library, MTA filter implementation and associated tools.

base64 RFC1113 Vanilla ANSI-C Code for a portable stand-alone file encode/decode utility. In 2001, I asked people to 'Help me break it!' Since then, 10+years later, the code remains unbroken and is in wide production use world-wide. It has been ported to all major architectures and been used as a template for ports to different computer and human languages. This is very mature and stable code. Although this comes from a project that was constrained by export controls and is used in secure systems, it is not security code per-se. I have therefore altered the 'Export Controls' category.

Bamboo is part of the thoughtbot Elixir family of projects. Flexible and easy-to-use email for Elixir. Built-in support for popular mail delivery services. Bamboo ships with adapters for several popular mail delivery services, including Mandrill, Mailgun, and SendGrid. It's also quite easy to write your own delivery adapter if your platform isn't yet supported. Deliver emails in the background. Most of the time you don't want or need to wait for the email to send. Bamboo makes it easy with Mailer.deliver_later. A functional approach to mail delivery. Emails are created, manipulated, and sent using plain functions. This makes composition a breeze and fits naturally into your existing Elixir app. Unit test with ease. Bamboo separates email creation and email delivery allowing you to test by asserting against email fields without the need for special functions. Dead-simple integration tests. Bamboo provides helper functions to make integration testing easy and robust.

C library intended to give C/C++ developers a quick and easy way to send e-mail from their applications. Supports multiple To/Cc/Bcc recipients and multiple attachments without size limitation. For the actual SMTP communication either libcurl can be used or the built in SMTP support. The library can also be used to just create a multipart MIME message body. Also comes with a command line application (quickmail) for sending mails (mutiple attachments supported) from command line or scripts. Cross-platform. Binary packages available for Windows (32-bit and 64-bit).

libmail is a C library intended to help programmers when adding mail checking and retrieving capabilities to their applications, supporting popular mail protocols like IMAP and POP3 as well as *nix-like mailboxes.

Bunch of useful filters for AngularJS (with no external dependencies!). You can install angular-filter using 4 different methods. Include angular-filter.js (or angular-filter.min.js) in your index.html, after including Angular itself. Add 'angular.filter' to your main module's list of dependencies. If a string is provided, it will filter out duplicates using the provided expression.

JavaEmailer is a Java Classes Library that allows Java developers to easily integrate a mass mailer to their applications. JavaEmailer manages file attachments, SMTP servers, CCs, BCCs, plain text and/or html messages, and more...

HTML to PDF est un génerateur de fichiers PDF.

A BASH function library of neat stuff for dealing with electronic mail. The library provides support for unencrypted and TLS encrypted relaying of email with attachments, special mailing list filtering and From address spoofing.

The Mailtext MUI custom class package (for Amigas) is especially designed to display electronic messages. Its main features cover: Handling of font attributes, highlighting of quoted text passages and highlighting and handling of URLs.

.NET Implementation of the MadMimi mailing list management API.

ImapHandler is a fsock-based low-level IMAP client for PHP intended for developers who want less abstraction than provided by the imap extension or PEAR::Mail_IMAP but don't want to have to worry about parsing everything themselves.

SMTP4PHP is a collection of PHP classes, dedicated for composing and sending multipart/mixed email messages quickly and easily, with or without embedded images and/or attachments.

C# .NET library implementing the Pop3 message retrieval protocol

Smtp client libraru written entirely in C# for use within any C#, VB.NET, C++.NET or F# application

(주)앤드와이즈의 대량메일발송 솔루션인 썬더메일5.0( http://www.thundermail.co.kr/thundermail/ ) 의 automail 기능을 이용하기위한 connector java 라이브러리.

The Email Checker PHP SDK is part of the Easy Email Verification - URL Checker ecosystem, designed to help developers integrate real-time email verification into their PHP applications. It uses the Easy Email Verification API to validate if an email address is real, active, and safe to use. The SDK performs domain and MX record checks, SMTP validation, and detection of disposable or role-based addresses. It provides a lightweight and reliable cURL-based implementation that returns structured JSON responses. This project is officially maintained by Easy Email Verification Ltd. For technical documentation and API reference, visit https://www.easyemailverification.com

libdkim++ is a lightweight and portable DKIM (RFC4871) library for *NIX, supporting both signing and SDID/ADSP verification sponsored by Halon Security. libdkim++ has extensive unit test coverage and aims to fully comply with the current RFC.

libpop3 is a very light POP3 library for C. It allows to list, fetch and remove messages from a POP3 mailbox. This library is using the RFC1939 as reference, and uses most basic POP3 commands to provide maximum compatibility across different servers. libpop3 is written in pure ANSI C89 without any external dependencies, thus it can be compiled and used on anything, anywhere. Since it is very light, it is designed to be used as a static library (but you could just as well incorporate its code right into your project).

Stalwart Mail Parser is a high-performance Rust library designed for parsing and analyzing email messages. It efficiently handles complex MIME structures, supports various encodings, and is optimized for speed and robustness. The library is suitable for applications requiring detailed email processing and analysis.​