Netscape 4.78 seems to be very picky about mime multipart/alternative?
(This may be sort of OT for this forum, but I figured I'd give it a shot.)
I'm experimenting with the javamail API and am having undesired results with mime multipart/alternative.
The message I'm constructing looks like it's correct on inspection (see [1] below), but Netscape Messenger 4.78 insists on displaying the text/plain part, not the text/html part. When I create a similar message from within Messenger (see [2] below), it looks to me to be virtually the same, but Messenger properly displays the text/html part.
Also, when I send my sample message [1] to Outlook Express, OE correctly displays the text/html part. (Haven't tried Eudora yet.)
Is it possibly ordering of the parts? The charset? I guess I can test some more...
My sample code is listed at [3].
Anyone have any ideas?
Thanks,
dwh
[1] Source of the message as constructed by my sample program (some information redacted for privacy):
Return-Path: <[email protected]>
Delivered-To: dhaskin-mydomainname:[email protected]
X-Envelope-To: [email protected]
Received: (qmail 98334 invoked from network); 1 Aug 2002 14:08:55 -0000
Received: from relay1.myhostingprovider.com (HELO relay.myhostingprovider.com) (some.i.p.address)
by yowza.myhostingprovider.com with SMTP; 1 Aug 2002 14:08:55 -0000
Received: (qmail 72904 invoked from network); 1 Aug 2002 14:08:54 -0000
Received: from anotheraddress.anotherprovider.com (HELO dhaskin) (another.i.p.address)
by relay1.myhostingprovider.com with SMTP; 1 Aug 2002 14:08:54 -0000
X-pair-Authenticated: yet.another.ip.address
Message-ID: <4469286.1028211013779.JavaMail.dhaskin@dhaskin>
From: [email protected]
To: [email protected]
Subject: Test
Mime-Version: 1.0
Content-Type: multipart/alternative;
boundary="----=_Part_0_10910135.1028211013519"
X-Mozilla-Status: 8001
X-Mozilla-Status2: 00000000
X-UIDL: 8a3987a249ce2fba
------=_Part_0_10910135.1028211013519
Content-Type: text/html; charset=Cp1252
Content-Transfer-Encoding: 7bit
<html><b>This</b> is a <i>test</i></html>
------=_Part_0_10910135.1028211013519
Content-Type: text/plain; charset=Cp1252
Content-Transfer-Encoding: 7bit
This is plain text
------=_Part_0_10910135.1028211013519--
[2] Source of a similar message as constructed by Netscape Messenger:
Return-Path: <[email protected]>
Received: from 127.0.0.1 ([127.0.0.1])
by dhaskin (JAMES SMTP Server 2.0a3-cvs) with SMTP ID 181
for <dhaskin@localhost>;
Wed, 31 Jul 2002 14:09:45 -0400
Message-ID: <[email protected]>
Date: Wed, 31 Jul 2002 14:09:45 -0400
From: Denis Haskin <[email protected]>
X-Mailer: Mozilla 4.78 [en] (Windows NT 5.0; U)
X-Accept-Language: en
MIME-Version: 1.0
To: dhaskin@localhost
Subject: test from Netscape mail
Content-Type: multipart/alternative;
boundary="------------6AA9B235754EC404EA78FD46"
X-Mozilla-Status: 8001
X-Mozilla-Status2: 00000000
X-UIDL: Mail1028138986024-82
--------------6AA9B235754EC404EA78FD46
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
In both plain and html
--------------6AA9B235754EC404EA78FD46
Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: 7bit
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
In both plain and <b>html</b></html>
--------------6AA9B235754EC404EA78FD46--
[3]My sample code for sending the message: (yes, stolen straight from the javamail tutorial.)package net.stuff.mail;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
public class Notifier {
public void notify(final String s) throws Exception {
Properties props = System.getProperties();
props.put("mail.smtp.host", m_host);
javax.mail.Session session = javax.mail.Session.getDefaultInstance(props);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(m_from));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(m_to));
message.setSubject("Test");
MimeMultipart multipart = new MimeMultipart("alternative");
MimeBodyPart part = new MimeBodyPart();
part.setContent(s, "text/html; charset=" + System.getProperty("file.encoding"));
multipart.addBodyPart(part);
MimeBodyPart part2 = new MimeBodyPart();
part2.setContent("This is plain text", "text/plain; charset=" + System.getProperty("file.encoding"));
multipart.addBodyPart(part2);
message.setContent(multipart);
Transport.send(message);
public static void main(String[] args) throws Exception {
Notifier n = new Notifier();
n.notify("<html><b>This</b> is a <i>test</i></html>");
final private String m_host = "localhost";
final private String m_from = "dhaskin@localhost";
final private String m_to = "dhaskin@localhost";
}
Thanks for the pointer.
It turns out it's the order of the parts that seems to matter to Netscape. It seems to use the last bodypart by default. So all I did was move the text/html part last, and now Netscape does what I expect.
I tried taking out the charset and encoding, and it still works... it's definitely the order.
Aha. This is actually indicated by the MIME RFC. From http://www.isi.edu/in-notes/rfc2046.txt, section 5.1.4:
In this case, the alternatives appear in an order of increasing faithfulness to the original content. In general, the best choice is the LAST part of a type supported by the recipient system's local environment.
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