JavaMail is losing some POP3 message headers and treats multipart/mixed as text/plain

StackOverflow https://stackoverflow.com/questions/12204804

Question

I am having a strange issue parsing some POP3 messages in JavaMail 1.4.4 - Java 1.4, also in Java 1.6.

I am parsing a com.sun.mail.pop3.POP3Message retrieved from a Windows 2003 POP3 service mailbox. When I go through the getAllHeaderLines() Enumeration and compare them to the source message I see that the Reply-To header is cut off in mid email address and all remaining headers are missing (specifically Subject, To, In-Reply-To, MIME-Version, Contact-Type, Return-Path and X-OriginalArrivalTime). The getContentType() method returns text/plain and the getContent() method returns the entire multipart/mixed message as a String.

Everything about the message looks normal and matches the source message file when I turn on JavaMail debug mode.

Any ideas would be appreciated.

Here is a snippet from the source message file in the POP3 mailbox:

Message-ID: <1345995532.54860.YahooMailNeo@web111910.mail.gq1.yahoo.com>
Date: Sun, 26 Aug 2012 08:38:52 -0700
From: Secure Comfort <securecomforttransportation@ymail.com>
Reply-To: Secure Comfort <securecomforttransportation@ymail.com>
Subject: Language & Transportation Service 
To: "xxxxxx@xxxxxx.com"
    < xxxxxx @ xxxxxx.com>
In-Reply-To: <1345995390.53486.YahooMailNeo@web111908.mail.gq1.yahoo.com>
MIME-Version: 1.0
Content-Type: multipart/mixed;
    boundary="1816409020-1433069823-1345995533=:54860"
Return-Path: securecomforttransportation@ymail.com
X-OriginalArrivalTime: 26 Aug 2012 15:39:22.0287 (UTC) FILETIME=[F6D67BF0:01CD83A0]

--1816409020-1433069823-1345995533=:54860
Content-Type: multipart/alternative;
    boundary="1816409020-520494517-1345995533=:54860"

--1816409020-520494517-1345995533=:54860
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Here are most of the getters for the MimeMessage:

Content ID=null
Content Language=null
Content MD5=null
Content Type=text/plain
Data Handler=javax.mail.internet.MimeBodyPart$MimePartDataHandler
Description=null
Disposition=null
Encoding=null
File Name=null
Line Count=-1
Message ID=<1345995532.54860.YahooMailNeo@web111910.mail.gq1.yahoo.com>
Received Date=null
Sent Date=Sun Aug 26 10:38:52 CDT 2012
Size=7480850
Subject=null
Was it helpful?

Solution

What does the debug output from JavaMail show? (If you don't want to post it here, send it to me at javamail_ww@oracle.com.)

There's no header size limit in JavaMail.

Possibly you have a firewall or anti-virus software that's intercepting the conversation with the server and (accidentally) introducing this break in the message headers.

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