PHPackages                             php-standard-library/smtp - PHPackages - PHPackages  [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register)

1. [Directory](/)
2. /
3. [Mail & Notifications](/categories/mail)
4. /
5. php-standard-library/smtp

ActiveLibrary[Mail & Notifications](/categories/mail)

php-standard-library/smtp
=========================

RFC 5321 SMTP client for sending messages

6.2.1(1mo ago)00MITPHPPHP ~8.4.0 || ~8.5.0

Since May 23Pushed 1mo agoCompare

[ Source](https://github.com/php-standard-library/smtp)[ Packagist](https://packagist.org/packages/php-standard-library/smtp)[ Docs](https://php-standard-library.dev)[ RSS](/packages/php-standard-library-smtp/feed)WikiDiscussions next Synced 3w ago

READMEChangelog (2)Dependencies (14)Versions (4)Used By (0)

PHP Standard Library - SMTP
===========================

[](#php-standard-library---smtp)

RFC 5321 SMTP client for sending messages.

---

- [Documentation](https://php-standard-library.dev)
- [Contributing](https://github.com/php-standard-library/php-standard-library/blob/next/CONTRIBUTING.md)
- [Create Pull Request](https://github.com/php-standard-library/php-standard-library/pulls)
- [Report an Issue](https://github.com/php-standard-library/php-standard-library/issues)

###  Health Score

40

—

FairBetter than 86% of packages

Maintenance94

Actively maintained with recent releases

Popularity0

Limited adoption so far

Community6

Small or concentrated contributor base

Maturity53

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

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 ~0 days

Total

3

Last Release

32d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/8489d7c85bfa7c637b8e13484f3f659652aea0568b6e7f9e66edeb0649b5a2f1?d=identicon)[azjezz](/maintainers/azjezz)

---

Top Contributors

[![azjezz](https://avatars.githubusercontent.com/u/29315886?v=4)](https://github.com/azjezz "azjezz (8 commits)")

---

Tags

emailmailrfc5321smtpmailemailsmtpRFC5321

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/php-standard-library-smtp/health.svg)

```
[![Health](https://phpackages.com/badges/php-standard-library-smtp/health.svg)](https://phpackages.com/packages/php-standard-library-smtp)
```

###  Alternatives

[mlocati/spf-lib

Parse, build and validate SPF (Sender Policy Framework) DNS records

67920.0k4](/packages/mlocati-spf-lib)[pear/net_smtp

An implementation of the SMTP protocol

263.1M21](/packages/pear-net-smtp)[thefox/smtpd

SMTP server (library) written in pure PHP.

1262.5k1](/packages/thefox-smtpd)[ikkez/f3-mailer

SMTP plugin wrapper for PHP Fat-Free Framework

209.0k2](/packages/ikkez-f3-mailer)

PHPackages © 2026

[Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)