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[Mail & Notifications](/categories/mail) 4. / 5. sendgrid/smtpapi ActiveLibrary[Mail & Notifications](/categories/mail) sendgrid/smtpapi ================ Build SendGrid X-SMTPAPI headers in PHP. 0.7.0(4y ago)696.5M—3.7%54[2 PRs](https://github.com/sendgrid/smtpapi-php/pulls)2MITPHPPHP >=7.3 Since Jan 1Pushed 3y ago191 watchersCompare [ Source](https://github.com/sendgrid/smtpapi-php)[ Packagist](https://packagist.org/packages/sendgrid/smtpapi)[ Docs](https://github.com/sendgrid/smtpapi-php)[ RSS](/packages/sendgrid-smtpapi/feed)WikiDiscussions main Synced 1mo ago READMEChangelog (10)Dependencies (2)Versions (21)Used By (2) [![Twilio SendGrid Logo](twilio_sendgrid_logo.png)](twilio_sendgrid_logo.png) [![BuildStatus](https://github.com/sendgrid/smtpapi-php/actions/workflows/test-and-deploy.yml/badge.svg)](https://github.com/sendgrid/smtpapi-php/actions/workflows/test-and-deploy.yml)[![Latest Stable Version](https://camo.githubusercontent.com/27eb34608dc4c9e3d7b453ae4673533ca633a0f2b8ec486851f9a7c5084e5aa9/68747470733a2f2f706f7365722e707567782e6f72672f73656e64677269642f736d74706170692f76657273696f6e2e706e67)](https://packagist.org/packages/sendgrid/smtpapi)[![Latest Version on Packagist](https://camo.githubusercontent.com/7ab1af2cee154a60cdf104fc6cb55a82788f41e903ac3fd2522c543910220681/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f762f73656e64677269642f736d74706170692e7376673f7374796c653d666c61742d737175617265)](https://packagist.org/packages/sendgrid/smtpapi)[![Twitter Follow](https://camo.githubusercontent.com/de94c561669f318291c017e2043b37498ea2f8820d5f35be0af56fe149c1a793/68747470733a2f2f696d672e736869656c64732e696f2f747769747465722f666f6c6c6f772f73656e64677269642e7376673f7374796c653d736f6369616c266c6162656c3d466f6c6c6f77)](https://twitter.com/sendgrid)[![GitHub contributors](https://camo.githubusercontent.com/f03d56ea63176d9c9b1f24c521155875bfcabc13529beda5ea3db9d70bd00fe6/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f636f6e7472696275746f72732f73656e64677269642f736d74706170692d7068702e737667)](https://github.com/sendgrid/smtpapi-php/graphs/contributors)[![MIT licensed](https://camo.githubusercontent.com/7013272bd27ece47364536a221edb554cd69683b68a46fc0ee96881174c4214c/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4d49542d626c75652e737667)](LICENSE) **This module helps build Twilio SendGrid's SMTP API headers.** Learn more about the SMTP API at [Twilio SendGrid's documentation](https://sendgrid.com/docs/API_Reference/SMTP_API/index.html). Announcements ============= [](#announcements) All the updates to this module are documented in our [CHANGELOG](CHANGELOG.md). Table of Contents ================= [](#table-of-contents) - [Installation](#installation) - [Quick Start](#quick-start) - [Usage](#usage) - [Announcements](#announcements) - [How to Contribute](#how-to-contribute) - [About](#about) - [Support](#support) - [License](#license) Installation ============ [](#installation) Prerequisites ------------- [](#prerequisites) - PHP version 7.3, 7.4, 8.0, or 8.1 - The Twilio SendGrid service, starting at the [free level](https://sendgrid.com/free?source=smtpapi-php) Install with Composer --------------------- [](#install-with-composer) The following recommended installation requires [composer](http://getcomposer.org). Add the following to your `composer.json` file. ``` { "require": { "sendgrid/smtpapi": "^0.7.0" } } ``` Then at the top of your script require the autoloader: ``` require 'vendor/autoload.php'; ``` #### Alternative: Install package from zip [](#alternative-install-package-from-zip) If you are not using Composer, simply download and install the **[latest packaged release of the library as a zip](https://github.com/sendgrid/smtpapi-php/releases/download/0.7.0/smtpapi-php.zip)**. [**⬇︎ Download Packaged Library ⬇︎**](https://github.com/sendgrid/smtpapi-php/releases/download/0.7.0/smtpapi-php.zip) Then require the library from package: ``` require('path/to/smtpapi-php/smtpapi-php.php'); ``` The previous versions of the library can be downloaded directly from [GitHub](https://github.com/sendgrid/smtpapi-php/releases). Setup Environment Variables --------------------------- [](#setup-environment-variables) ### Environment Variable [](#environment-variable) Update the development environment with your [SENDGRID\_API\_KEY](https://app.sendgrid.com/settings/api_keys), for example: ``` echo "export SENDGRID_API_KEY='YOUR_API_KEY'" > sendgrid.env echo "sendgrid.env" >> .gitignore source ./sendgrid.env ``` Quick Start =========== [](#quick-start) ``` $header = new Smtpapi\Header(); $header->addTo('test1@example.com'); $header->addTo('test2@example.com'); print $header->jsonString(); ``` Usage ===== [](#usage) - [Twilio SendGrid Docs](https://sendgrid.com/docs/API_Reference/SMTP_API/index.html) - [Example Code](examples) How to Contribute ----------------- [](#how-to-contribute) We encourage contributions to our projects; please see our [CONTRIBUTING](CONTRIBUTING.md) guide for details. Quick links: - [Feature Request](CONTRIBUTING.md#feature_request) - [Bug Reports](CONTRIBUTING.md#submit_a_bug_report) - [Improvements to the Codebase](CONTRIBUTING.md#improvements_to_the_codebase) - [Review Pull Requests](CONTRIBUTING.md#code-reviews) About ===== [](#about) smtpapi-php is maintained and funded by Twilio SendGrid, Inc. The names and logos for smtpapi-php are trademarks of Twilio SendGrid, Inc. Support ======= [](#support) If you need help using SendGrid, please check the [Twilio SendGrid Support Help Center](https://support.sendgrid.com). License ======= [](#license) [The MIT License (MIT)](LICENSE) ### Health Score 46 — FairBetter than 93% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity59 Moderate usage in the ecosystem Community39 Small or concentrated contributor base Maturity57 Maturing project, gaining track record Bus Factor5 5 contributors hold 50%+ of commits How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~169 days Recently: every ~28 days Total 19 Last Release 1475d ago PHP version history (3 changes)0.0.1PHP >=5.3 0.6.0PHP >=5.6 0.7.0PHP >=7.3 ### Community Maintainers ![](https://www.gravatar.com/avatar/15c5d48ebf689d7036efb9c4848dba91aca5a696e18b5e738fe3702424a5072b?d=identicon)[twilio-dx](/maintainers/twilio-dx) --- Top Contributors [![thinkingserious](https://avatars.githubusercontent.com/u/146695?v=4)](https://github.com/thinkingserious "thinkingserious (30 commits)")[![motdotla](https://avatars.githubusercontent.com/u/3848?v=4)](https://github.com/motdotla "motdotla (22 commits)")[![twilio-ci](https://avatars.githubusercontent.com/u/15808651?v=4)](https://github.com/twilio-ci "twilio-ci (17 commits)")[![owenvoke](https://avatars.githubusercontent.com/u/1899334?v=4)](https://github.com/owenvoke "owenvoke (14 commits)")[![twilio-dx](https://avatars.githubusercontent.com/u/76711946?v=4)](https://github.com/twilio-dx "twilio-dx (14 commits)")[![eddiezane](https://avatars.githubusercontent.com/u/959573?v=4)](https://github.com/eddiezane "eddiezane (13 commits)")[![jmauerhan](https://avatars.githubusercontent.com/u/4204262?v=4)](https://github.com/jmauerhan "jmauerhan (11 commits)")[![eddytan](https://avatars.githubusercontent.com/u/6778749?v=4)](https://github.com/eddytan "eddytan (7 commits)")[![thepriefy](https://avatars.githubusercontent.com/u/10849586?v=4)](https://github.com/thepriefy "thepriefy (6 commits)")[![pushkyn](https://avatars.githubusercontent.com/u/3326427?v=4)](https://github.com/pushkyn "pushkyn (4 commits)")[![eshanholtz](https://avatars.githubusercontent.com/u/28262845?v=4)](https://github.com/eshanholtz "eshanholtz (4 commits)")[![nikoskip](https://avatars.githubusercontent.com/u/1230033?v=4)](https://github.com/nikoskip "nikoskip (3 commits)")[![nocategory](https://avatars.githubusercontent.com/u/12294525?v=4)](https://github.com/nocategory "nocategory (3 commits)")[![fishnux](https://avatars.githubusercontent.com/u/29991194?v=4)](https://github.com/fishnux "fishnux (3 commits)")[![awwa](https://avatars.githubusercontent.com/u/327181?v=4)](https://github.com/awwa "awwa (2 commits)")[![ssiddhantsharma](https://avatars.githubusercontent.com/u/29195354?v=4)](https://github.com/ssiddhantsharma "ssiddhantsharma (2 commits)")[![saputradharma](https://avatars.githubusercontent.com/u/45839696?v=4)](https://github.com/saputradharma "saputradharma (2 commits)")[![JenniferMah](https://avatars.githubusercontent.com/u/42650198?v=4)](https://github.com/JenniferMah "JenniferMah (2 commits)")[![yashasingh](https://avatars.githubusercontent.com/u/14851240?v=4)](https://github.com/yashasingh "yashasingh (1 commits)")[![gr8shivam](https://avatars.githubusercontent.com/u/4292333?v=4)](https://github.com/gr8shivam "gr8shivam (1 commits)") --- Tags apiemailtwiliosendgridsendgridsmtpsmtpapixsmtpX-SMTP ### Code Quality TestsPHPUnit Code StylePHP\_CodeSniffer ### Embed Badge ![Health badge](/badges/sendgrid-smtpapi/health.svg) ``` [![Health](https://phpackages.com/badges/sendgrid-smtpapi/health.svg)](https://phpackages.com/packages/sendgrid-smtpapi) ``` ### Alternatives [sendgrid/sendgrid This library allows you to quickly and easily send emails through Twilio SendGrid using PHP. 1.5k47.5M164](/packages/sendgrid-sendgrid)[fastglass/sendgrid This library allows you to send emails through SendGrid using PHP and Guzzle 6.x. 213.7M](/packages/fastglass-sendgrid) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)