使用 JavaMail 阅读电子邮件时，MimeMultipart 计数为零
MimeMultipart count is zero when an email is read using JavaMail
我的应用程序将电子邮件发送到 Exchange 邮件服务器，邮件服务器配置有第三方应用程序，它将电子邮件路由到代理并代理回复该电子邮件。应用程序从用于发送电子邮件的邮箱中读取代理回复。
邮件发送代码如下；
Message mimeMessage = new MimeMessage(session);
mimeMessage.setFrom(new InternetAddress(from));
mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
mimeMessage.setSubject(subject);
mimeMessage.setContent(emailText,"text/plain");
mimeMessage.setReplyTo(replyToAddress);
Transport.send(mimeMessage);
这非常有效。收到代理回复后，应用程序将其读取为；
if (message.isMimeType("multipart/MIXED")) {
logger.info("Email MIME Type is: multipart/MIXED");
MimeMultipart multipart =(MimeMultipart)message.getContent();
logger.info("Content type = "+multipart.getContentType());
int count = multipart.getCount();
}
内容类型为 "multipart/mixed" 但计数为 0 表示此电子邮件中没有任何部分。
我需要设置系统 属性,
System.setProperty("mail.mime.multipart.allowempty", "true");
如果未设置，multipart.getCount() 抛出 "missingBoundryException"。
为什么会这样？
我可以看到代理的回复不是空的。
发送的电子邮件内容类型为 text/plain，为什么回复类型为 multipart/mixed？
这是由于第三方应用程序对电子邮件的任何无效格式造成的吗？解决方法是什么？
代理回复截图如下。
以下是原始 MIME 内容，
Received: from sociaminer.host (192.168.1.29) by thirdpartHost
(192.168.1.53) with Microsoft SMTP Server (TLS) id 14.1.218.12; Thu, 19 Jan
2017 17:06:26 +0500
To: hafiz <hafiz@bla.bla>
Message-ID: <hassan.MESSAGEID@bla.bla>
In-Reply-To: <CF72F94@bla.bla>
References: <CF72F945A@bla.bla>
Subject: Re: 1122+50
Content-Type: multipart/mixed;
boundary="----=_Part_127_14151461.1484827604583"
From: <reply@bla.bla>
Return-Path: reply@bla.bla
Date: Thu, 19 Jan 2017 17:06:26 +0500
X-MS-Exchange-Organization-AuthSource: bla.bla
X-MS-Exchange-Organization-AuthAs: Internal
X-MS-Exchange-Organization-AuthMechanism: 06
X-Originating-IP: [SocialMinerIP]
MIME-Version: 1.0
------=_Part_127_14151461.1484827604583
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: 7bit
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">Reply to 50<br>
<blockquote><hr>
<b>From:</b> hafiz <hafiz@bla.bla><br><b>Sent:</b> Thursday, January 19, 2017 5:05 PM<br><b>To:</b> testing2 <testing2@bla.bla><br><b>Subject:</b> 1122+50<br>
<html dir="ltr">
<head>
<style type="text/css" id="owaParaStyle"></style>
</head>
<body fpstyle="1" ocsi="0">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Testing 50</div>
</body>
</html>
</blockquote>
------=_Part_127_14151461.1484827604583--
JavaMail 调试输出如下所示，
DEBUG: setDebug: JavaMail version 1.4.7
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle]
DEBUG IMAP: mail.imap.fetchsize: 16384
DEBUG IMAP: mail.imap.ignorebodystructuresize: false
DEBUG IMAP: mail.imap.statuscachetimeout: 1000
DEBUG IMAP: mail.imap.appendbuffersize: -1
DEBUG IMAP: mail.imap.minidletime: 10
DEBUG IMAP: disable AUTH=PLAIN
DEBUG IMAP: enable STARTTLS
DEBUG IMAP: trying to connect to host "Echange IP", port 143, isSSL false
* OK The Microsoft Exchange IMAP4 service is ready.
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 LOGINDISABLED STARTTLS UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
A0 OK CAPABILITY completed.
DEBUG IMAP: protocolConnect login, host=192.168.1.53, user=hafiz@bla.bla, password=<non-null>
A1 STARTTLS
A1 OK Begin TLS negotiation now.
A2 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 AUTH=NTLM AUTH=GSSAPI AUTH=PLAIN UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
A2 OK CAPABILITY completed.
DEBUG IMAP: AUTH: NTLM
DEBUG IMAP: AUTH: GSSAPI
DEBUG IMAP: AUTH: PLAIN
DEBUG IMAP: AUTHENTICATE NTLM command trace suppressed
DEBUG NTLM: type 1 message: 4E 54 4C 4D 53 53 50 00 01 00 00 00 03 A2 00 00 00 00 00 00 23 00 00 00 03 00 03 00 20 00 00 00 31 39 32
DEBUG NTLM: type 3 message: 4E 54 4C 4D 53 53 50 00 03 00 00 00 18 00 18 00 68 00 00 00 18 00 18 00 80 00 00 00 00 00 00 00 40 00 00 00 22 00 22 00 40 00 00 00 06 00 06 00 62 00 00 00 00 00 00 00 98 00 00 00 01 82 00 00 68 00 61 00 66 00 69 00 7A 00 40 00 65 00 66 00 6C 00 61 00 62 00 2E 00 6C 00 6F 00 63 00 61 00 6C 00 31 00 39 00 32 00 3B 5E 2B 86 67 49 E3 01 C9 9E F2 CA ED 54 21 11 81 89 94 C6 EC E0 26 E3 BA DB E7 5A F4 CA 28 17 7C 0E 8A 08 18 B5 5A 4E 72 4F C5 7F 52 64 FA 76
DEBUG IMAP: AUTHENTICATE NTLM command result: A3 OK AUTHENTICATE completed.
A4 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 AUTH=NTLM AUTH=GSSAPI AUTH=PLAIN UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
A4 OK CAPABILITY completed.
DEBUG IMAP: AUTH: NTLM
DEBUG IMAP: AUTH: GSSAPI
DEBUG IMAP: AUTH: PLAIN
DEBUG IMAP: connection available -- size: 1
A5 SELECT INBOX
* 40 EXISTS
* 0 RECENT
* FLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)
* OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)] Permanent flags
* OK [UNSEEN 39] Is the first unseen message
* OK [UIDVALIDITY 436] UIDVALIDITY value
* OK [UIDNEXT 46] The next unique identifier value
A5 OK [READ-WRITE] SELECT completed.
A6 SEARCH UNSEEN ALL
* SEARCH 39
A6 OK SEARCH completed.
A7 SEARCH UNSEEN ALL
* SEARCH 39
A7 OK SEARCH completed.
main INFO emailToSms.EmailReader - 1 unread emails read from inbox.
A8 STORE 39 +FLAGS (\Seen)
* 39 FETCH (FLAGS (\Seen))
A8 OK STORE completed.
A9 FETCH 39 (BODY.PEEK[HEADER])
* 39 FETCH (BODY[HEADER] {851}
MIME-Version: 1.0
Received: from HOST (IP) by HOST
(192.168.1.53) with Microsoft SMTP Server (TLS) id 14.1.218.12; Thu, 19 Jan
2017 17:06:26 +0500
To: hafiz <hafiz@bla.bla>
Message-ID: <hassan.B69E3DD110000159000004A73F57FEE3.1484827604448.cisco-ccp@bla.bla>
In-Reply-To: <CF72F945A1ED2E438A53A11DA9415F65A0E981@Expert.bla.bla>
References: <CF72F945A1ED2E438A53A11DA9415F65A0E981@Expert.bla.bla>
Subject: Re: 1122+50
Content-Type: multipart/mixed;
boundary="----=_Part_127_14151461.1484827604583"
From: <testing2@bla.bla>
Return-Path: testing2@bla.bla
Date: Thu, 19 Jan 2017 17:06:26 +0500
X-MS-Exchange-Organization-AuthSource: Expert.bla.bla
X-MS-Exchange-Organization-AuthAs: Internal
X-MS-Exchange-Organization-AuthMechanism: 06
X-Originating-IP: [IP]
)
A9 OK FETCH completed.
A10 FETCH 39 (ENVELOPE INTERNALDATE RFC822.SIZE)
* 39 FETCH (ENVELOPE ("Thu, 19 Jan 2017 17:06:26 +0500" "Re: 1122+50" ((NIL NIL "testing2" "bla.bla")) NIL NIL (("hafiz" NIL "hafiz" "bla.bla")) NIL NIL "<CF72F945A1ED2E438A53A11DA9415F65A0E981@Expert.bla.bla>" "<hassan.B69E3DD110000159000004A73F57FEE3.1484827604448.cisco-ccp@bla.bla>") INTERNALDATE "19-Jan-2017 17:06:26 +0500" RFC822.SIZE 1250)
A10 OK FETCH completed.
A11 FETCH 39 (BODYSTRUCTURE)
* 39 FETCH (BODYSTRUCTURE ("multipart" "mixed" ("boundary" "----=_Part_127_14151461.1484827604583") NIL NIL 7BIT 0 NIL NIL NIL NIL))
A11 OK FETCH completed.
DEBUG IMAP: IMAPProtocol noop
A12 NOOP
A12 OK NOOP completed.
这是 Microsoft Exchange 中的错误。向 Microsoft 报告此错误并尽可能升级到更新版本或更新服务包，以防他们已经修复它。
Exchange 正在返回消息的 BODYSTRUCTURE 信息，就好像它是一个单部分消息，而实际上它是一个多部分消息。这违反了 IMAP 协议规范。
您可以使用 workaround in the JavaMail FAQ.
此外，您可能想要 upgrade to a newer version of JavaMail - 1.4.7 已经很旧了，当前版本是 1.5.6。
我的应用程序将电子邮件发送到 Exchange 邮件服务器，邮件服务器配置有第三方应用程序，它将电子邮件路由到代理并代理回复该电子邮件。应用程序从用于发送电子邮件的邮箱中读取代理回复。
邮件发送代码如下；
Message mimeMessage = new MimeMessage(session);
mimeMessage.setFrom(new InternetAddress(from));
mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
mimeMessage.setSubject(subject);
mimeMessage.setContent(emailText,"text/plain");
mimeMessage.setReplyTo(replyToAddress);
Transport.send(mimeMessage);
这非常有效。收到代理回复后，应用程序将其读取为；
if (message.isMimeType("multipart/MIXED")) {
logger.info("Email MIME Type is: multipart/MIXED");
MimeMultipart multipart =(MimeMultipart)message.getContent();
logger.info("Content type = "+multipart.getContentType());
int count = multipart.getCount();
}
内容类型为 "multipart/mixed" 但计数为 0 表示此电子邮件中没有任何部分。
我需要设置系统 属性,
System.setProperty("mail.mime.multipart.allowempty", "true");
如果未设置，multipart.getCount() 抛出 "missingBoundryException"。
为什么会这样？ 我可以看到代理的回复不是空的。 发送的电子邮件内容类型为 text/plain，为什么回复类型为 multipart/mixed？
这是由于第三方应用程序对电子邮件的任何无效格式造成的吗？解决方法是什么？
代理回复截图如下。
以下是原始 MIME 内容，
Received: from sociaminer.host (192.168.1.29) by thirdpartHost
(192.168.1.53) with Microsoft SMTP Server (TLS) id 14.1.218.12; Thu, 19 Jan
2017 17:06:26 +0500
To: hafiz <hafiz@bla.bla>
Message-ID: <hassan.MESSAGEID@bla.bla>
In-Reply-To: <CF72F94@bla.bla>
References: <CF72F945A@bla.bla>
Subject: Re: 1122+50
Content-Type: multipart/mixed;
boundary="----=_Part_127_14151461.1484827604583"
From: <reply@bla.bla>
Return-Path: reply@bla.bla
Date: Thu, 19 Jan 2017 17:06:26 +0500
X-MS-Exchange-Organization-AuthSource: bla.bla
X-MS-Exchange-Organization-AuthAs: Internal
X-MS-Exchange-Organization-AuthMechanism: 06
X-Originating-IP: [SocialMinerIP]
MIME-Version: 1.0
------=_Part_127_14151461.1484827604583
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: 7bit
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">Reply to 50<br>
<blockquote><hr>
<b>From:</b> hafiz <hafiz@bla.bla><br><b>Sent:</b> Thursday, January 19, 2017 5:05 PM<br><b>To:</b> testing2 <testing2@bla.bla><br><b>Subject:</b> 1122+50<br>
<html dir="ltr">
<head>
<style type="text/css" id="owaParaStyle"></style>
</head>
<body fpstyle="1" ocsi="0">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Testing 50</div>
</body>
</html>
</blockquote>
------=_Part_127_14151461.1484827604583--
JavaMail 调试输出如下所示，
DEBUG: setDebug: JavaMail version 1.4.7
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle]
DEBUG IMAP: mail.imap.fetchsize: 16384
DEBUG IMAP: mail.imap.ignorebodystructuresize: false
DEBUG IMAP: mail.imap.statuscachetimeout: 1000
DEBUG IMAP: mail.imap.appendbuffersize: -1
DEBUG IMAP: mail.imap.minidletime: 10
DEBUG IMAP: disable AUTH=PLAIN
DEBUG IMAP: enable STARTTLS
DEBUG IMAP: trying to connect to host "Echange IP", port 143, isSSL false
* OK The Microsoft Exchange IMAP4 service is ready.
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 LOGINDISABLED STARTTLS UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
A0 OK CAPABILITY completed.
DEBUG IMAP: protocolConnect login, host=192.168.1.53, user=hafiz@bla.bla, password=<non-null>
A1 STARTTLS
A1 OK Begin TLS negotiation now.
A2 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 AUTH=NTLM AUTH=GSSAPI AUTH=PLAIN UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
A2 OK CAPABILITY completed.
DEBUG IMAP: AUTH: NTLM
DEBUG IMAP: AUTH: GSSAPI
DEBUG IMAP: AUTH: PLAIN
DEBUG IMAP: AUTHENTICATE NTLM command trace suppressed
DEBUG NTLM: type 1 message: 4E 54 4C 4D 53 53 50 00 01 00 00 00 03 A2 00 00 00 00 00 00 23 00 00 00 03 00 03 00 20 00 00 00 31 39 32
DEBUG NTLM: type 3 message: 4E 54 4C 4D 53 53 50 00 03 00 00 00 18 00 18 00 68 00 00 00 18 00 18 00 80 00 00 00 00 00 00 00 40 00 00 00 22 00 22 00 40 00 00 00 06 00 06 00 62 00 00 00 00 00 00 00 98 00 00 00 01 82 00 00 68 00 61 00 66 00 69 00 7A 00 40 00 65 00 66 00 6C 00 61 00 62 00 2E 00 6C 00 6F 00 63 00 61 00 6C 00 31 00 39 00 32 00 3B 5E 2B 86 67 49 E3 01 C9 9E F2 CA ED 54 21 11 81 89 94 C6 EC E0 26 E3 BA DB E7 5A F4 CA 28 17 7C 0E 8A 08 18 B5 5A 4E 72 4F C5 7F 52 64 FA 76
DEBUG IMAP: AUTHENTICATE NTLM command result: A3 OK AUTHENTICATE completed.
A4 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 AUTH=NTLM AUTH=GSSAPI AUTH=PLAIN UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
A4 OK CAPABILITY completed.
DEBUG IMAP: AUTH: NTLM
DEBUG IMAP: AUTH: GSSAPI
DEBUG IMAP: AUTH: PLAIN
DEBUG IMAP: connection available -- size: 1
A5 SELECT INBOX
* 40 EXISTS
* 0 RECENT
* FLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)
* OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)] Permanent flags
* OK [UNSEEN 39] Is the first unseen message
* OK [UIDVALIDITY 436] UIDVALIDITY value
* OK [UIDNEXT 46] The next unique identifier value
A5 OK [READ-WRITE] SELECT completed.
A6 SEARCH UNSEEN ALL
* SEARCH 39
A6 OK SEARCH completed.
A7 SEARCH UNSEEN ALL
* SEARCH 39
A7 OK SEARCH completed.
main INFO emailToSms.EmailReader - 1 unread emails read from inbox.
A8 STORE 39 +FLAGS (\Seen)
* 39 FETCH (FLAGS (\Seen))
A8 OK STORE completed.
A9 FETCH 39 (BODY.PEEK[HEADER])
* 39 FETCH (BODY[HEADER] {851}
MIME-Version: 1.0
Received: from HOST (IP) by HOST
(192.168.1.53) with Microsoft SMTP Server (TLS) id 14.1.218.12; Thu, 19 Jan
2017 17:06:26 +0500
To: hafiz <hafiz@bla.bla>
Message-ID: <hassan.B69E3DD110000159000004A73F57FEE3.1484827604448.cisco-ccp@bla.bla>
In-Reply-To: <CF72F945A1ED2E438A53A11DA9415F65A0E981@Expert.bla.bla>
References: <CF72F945A1ED2E438A53A11DA9415F65A0E981@Expert.bla.bla>
Subject: Re: 1122+50
Content-Type: multipart/mixed;
boundary="----=_Part_127_14151461.1484827604583"
From: <testing2@bla.bla>
Return-Path: testing2@bla.bla
Date: Thu, 19 Jan 2017 17:06:26 +0500
X-MS-Exchange-Organization-AuthSource: Expert.bla.bla
X-MS-Exchange-Organization-AuthAs: Internal
X-MS-Exchange-Organization-AuthMechanism: 06
X-Originating-IP: [IP]
)
A9 OK FETCH completed.
A10 FETCH 39 (ENVELOPE INTERNALDATE RFC822.SIZE)
* 39 FETCH (ENVELOPE ("Thu, 19 Jan 2017 17:06:26 +0500" "Re: 1122+50" ((NIL NIL "testing2" "bla.bla")) NIL NIL (("hafiz" NIL "hafiz" "bla.bla")) NIL NIL "<CF72F945A1ED2E438A53A11DA9415F65A0E981@Expert.bla.bla>" "<hassan.B69E3DD110000159000004A73F57FEE3.1484827604448.cisco-ccp@bla.bla>") INTERNALDATE "19-Jan-2017 17:06:26 +0500" RFC822.SIZE 1250)
A10 OK FETCH completed.
A11 FETCH 39 (BODYSTRUCTURE)
* 39 FETCH (BODYSTRUCTURE ("multipart" "mixed" ("boundary" "----=_Part_127_14151461.1484827604583") NIL NIL 7BIT 0 NIL NIL NIL NIL))
A11 OK FETCH completed.
DEBUG IMAP: IMAPProtocol noop
A12 NOOP
A12 OK NOOP completed.
这是 Microsoft Exchange 中的错误。向 Microsoft 报告此错误并尽可能升级到更新版本或更新服务包，以防他们已经修复它。
Exchange 正在返回消息的 BODYSTRUCTURE 信息，就好像它是一个单部分消息，而实际上它是一个多部分消息。这违反了 IMAP 协议规范。
您可以使用 workaround in the JavaMail FAQ.
此外，您可能想要 upgrade to a newer version of JavaMail - 1.4.7 已经很旧了，当前版本是 1.5.6。