Postinius is a lightweight, Ruby-licious wrapper for the scarred and battle-hardened JavaMail API.

Postinius is a JRuby-only gem, and was written because we needed a well-tested mail library that handles multiple languages and character sets under JRuby.

You can use it to parse emails:

require 'postinius'
require 'postinius/message'

email = <<EndOfEmail
From: Don Werve <[email protected]>
To: [email protected]
Subject: Important message.

Hello, world!
EndOfEmail

message = Postinius::Message.new(email)
puts message.subject
puts message.from.
# => "Important message."

Or to create them from scratch:

message = Postinius::Message.new do
subject "Re: Important message."
from "[email protected]"
to "[email protected]"
text "The world is currently busy."
end

It supports all manner of multipart messages and attachments:

message = Postinius::Message.new do
subject "Re: Important message."
from "[email protected]"
to "[email protected]"
text "Oh... well, is Mars available?"
html "Oh... well, is <b>Mars</b> available?"
attach :file => 'haynes-manual-for-spirit-rover.pdf'
end

...and even handles foreign character sets just fine:

require 'postinius'
require 'postinius/message'

email = <<EndOfEmail
From: =?UTF-8?B?44OJ44Oz44O744Ov44O844OT?= <[email protected]>
To: [email protected]
Message-ID: <[email protected]>
Subject: =?UTF-8?B?44GT44KT44Gr44Gh44Gv54Gr5pif77yB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: base64

5YWI44Gr6YCB5L+h44GX44Gf44Oe44OL44Ol44Ki44Or44Gn44Ot44Oc44OD44OI5o6i5p+76LuK
44K544OU44Oq44OD44OI44GM55u044KM44KL44KI44GG44Gr44Gq44KL44Go5oCd44GE44G+44GZ
44CC
EndOfEmail

message = Postinius::Message.new(email)
puts message.from
# => "ドン・ワービ <[email protected]>"
puts message.subject
# => "こんにちは火星！"

Additional documentation will be forthcoming. :)

Postinius is licensed under the Apache 2.0 Open Source License; see the LICENSE file for details, and was written for Mad Wombat Software