horde/mail

Mail library

v3.0.0beta1 2026-04-02 00:00 UTC

Requires

• php: ^7.4 || ^8
• horde/exception: ^3 || dev-FRAMEWORK_6_0
• horde/idna: ^2 || dev-FRAMEWORK_6_0
• horde/mime: ^3 || dev-FRAMEWORK_6_0
• horde/stream_filter: ^3 || dev-FRAMEWORK_6_0
• horde/translation: ^3 || dev-FRAMEWORK_6_0
• horde/util: ^3 || dev-FRAMEWORK_6_0

Suggests

• horde/smtp: ^2 || dev-FRAMEWORK_6_0
• horde/stream_wrapper: ^3 || dev-FRAMEWORK_6_0
• mikepultz/netdns2: ^2.0

BSD-2-Clause

• Michael Slusarz

• smtp

README

Email address parsing (RFC 5322), mail transport, and mbox parsing (RFC 4155).

Part of the Horde framework.

Installation

composer require horde/mail

Upgrading

See doc/UPGRADING.md for API changes between releases and a full migration guide from the legacy lib/ classes to the modern src/ API.

Collaborator libraries

Package	Role
horde/stream	Typed stream wrappers (StreamInterface, Temp) used by transports and mbox parser
horde/smtp	SMTP/LMTP protocol client used by SmtpTransport and LmtpTransport (optional)
horde/eventdispatcher	PSR-14 event dispatcher for parser observability
horde/idna	Internationalized domain name encoding
horde/mime	MIME header encoding/decoding (legacy lib/ dependency)
horde/socket_client	TCP socket abstraction used by horde/smtp (optional)

Relevant RFCs

• RFC 5322 — Internet Message Format (address syntax)
• RFC 6532 — Internationalized Email Headers (EAI)
• RFC 2047 — MIME Message Header Extensions (encoded words)
• RFC 4155 — The application/mbox Media Type
• RFC 5321 — Simple Mail Transfer Protocol

License

BSD-2-Clause. See LICENSE.