Email JavaMail客户端读取新消息，但不读取现有消息

这里是JavaMail新手。我试图找出嵌入在一个非常大的系统中的Javamail客户机的问题所在。很抱歉，我没有一个简短、完整的示例，但我希望有人能给我一些关于如何调试此问题的提示

它是Java7中的JavaMail 1.4.3，运行在Windows7上。电子邮件服务器位于Linux机箱上。代码的目的是阅读收件箱中的所有电子邮件，删除和删除它们，对电子邮件进行一些处理，暂停一会儿，然后重复，永远循环。问题是，如果当这个程序启动并且JavaMail客户端代码执行时收件箱中已经有电子邮件，它就不会检索它们。但是，如果我在代码运行后向收件箱发送电子邮件，它会很好地检索它们

代码使用Store.getFolder（“收件箱”）获取收件箱，使用Folder.open（Folder.READ_WRITE）打开收件箱，并执行Folder.getMessages（）操作。getMessages（）调用在首次启动时始终不返回任何消息，但会返回程序启动后发送的消息

我正在使用Pine来验证收件箱是否包含消息，但我没有在Pine中打开消息，因此它们应该仍然是新的。如果我在运行此代码后使用Pine查看收件箱，它仍然包含程序启动前发送的旧消息，但不包含程序运行时发送给它的任何消息（它们已被成功读取、删除和删除）

代码启动时还应该读取收件箱中已经存在的邮件。我将mail.debug设置为true，然后输出。同样，任何关于如何深入研究的建议都将不胜感激。谢谢

---

//程序启动时第一次尝试读取邮件
调试：JavaMail版本1.4.3
调试：已成功加载资源：/META-INF/javamail.default.providers
调试：加载的提供程序的表
调试：按类名列出的提供程序：{com.sun.mail.smtp.SMTPSSLTTransport=javax.mail.Provider[TRANSPORT，smt
ps，com.sun.mail.smtp.SMTPSSLTTransport，sun Microsystems，Inc]，com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSP]
ORT，smtp，com.sun.mail.SMTPTransport，sun Microsystems，Inc]，com.sun.mail.imap.imapssltore=javax.mail.Provider[STOR
E、 imaps，com.sun.mail.imap.IMAPSSLStore，sun Microsystems，Inc]，com.sun.mail.pop3.pop3sslsstore=javax.mail.Provider[STORE，
pop3s，com.sun.mail.pop3.pop3sslsstore，sun Microsystems，Inc]，com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE，imap，
com.sun.mail.imap.IMAPStore，sun Microsystems，Inc]，com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE，pop3，com.sun.m
ail.pop3.POP3Store，Sun Microsystems，Inc]}
调试：协议列出的提供程序：{imaps=javax.mail.Provider[STORE，imaps，com.sun.mail.imap.imapssltore，S
un Microsystems，Inc.，imap=javax.mail.Provider[STORE，imap，com.sun.mail.imap.IMAPStore，sun Microsystems，Inc]，smtps=jav
ax.mail.Provider[TRANSPORT，smtps，com.sun.mail.smtp.smtpsslttransport，sun Microsystems，Inc]，pop3=javax.mail.Provider[STO
RE，pop3，com.sun.mail.pop3.POP3Store，sun Microsystems，Inc]，pop3s=javax.mail.Provider[STORE，pop3s，com.sun.mail.pop3.pop3
SSLStore，Sun Microsystems，Inc]，smtp=javax.mail.Provider[TRANSPORT，smtp，com.Sun.mail.smtp.SMTPTransport，Sun Microsystem
s、 公司]}
调试：已成功加载资源：/META-INF/javamail.default.address.map
DEBUG:getProvider（）返回javax.mail.Provider[STORE，imap，com.sun.mail.imap.IMAPStore，sun Microsystems，
公司]
调试：mail.imap.fetchsize:16384
调试：mail.imap.statuscachetimeout:1000
调试：mail.imap.appendbuffersize:-1
调试：mail.imap.minidle时间：10
调试：尝试连接到主机“10.128.200.85”，端口143，isSSL false
*OK[CAPABILITY IMAP4REV1 LOGIN-REFERRALS STARTTLS AUTH=LOGIN]pristine.ame.xx.com IMAP4REV1 2001.315rh于2013年12月30日星期一11:15:26-0500（美国东部时间）
IMAP调试：验证：登录
调试：protocolConnect登录，主机=10.128.200.85，用户=venuswmpublic，密码=
A0验证登录
+VxNLciw1laa==
DMVUDXN3BXB1YMXYW==
+UGFzc3dvcmQA
d2VibTEyMzQ=
A0 OK[功能IMAP4REV1空闲命名空间邮箱-引用扫描排序线程=引用线程=ORDEREDSUBJECT多重附加]用户venuswmpublic已验证
A1列表“”收件箱
*列表（\n周期）无收件箱
A1确定列表已完成
调试：连接可用--大小：1
A2选择收件箱
*0存在
*0最近
*正常[UID有效性1]UID有效性状态
*确定[UIDNEXT 1]预测下一个UID
*标志（\responsed\Flagged\Deleted\Draft\Seen）
*确定[PERMANENTFLAGS（）]永久标志
A2确定[读写]选择完成
A3删除
A3确定删除已完成
正在监视传入的电子邮件。。。
*OK[CAPABILITY IMAP4REV1 LOGIN-REFERRALS STARTTLS AUTH=LOGIN]pristine.ame.xx.com IMAP4REV1 2001.315rh在
2013年12月30日星期一11:15:38-0500（美国东部时间）
IMAP调试：验证：登录
A0验证登录
+VxNLciw1laa==
DMVUDXN3BXB1YMXYW==
+UGFzc3dvcmQA
d2VibTEyMzQ=
A0 OK[功能IMAP4REV1空闲命名空间邮箱-引用扫描排序线程=引用线程=ORDEREDSUBJECT多重附加]用户venuswmpublic已验证
IMAP调试：IMAPProtocol noop
阿努普
A1 OK NOOP已完成
IMAP调试：IMAPProtocol noop
A4Noop
A4 OK NOOP已完成
A5删除
A5确定删除已完成
A6删除
A6正常删除完成
调试：池已满，未添加经过身份验证的连接
A7关闭
A7正常关闭完成
A8注销
*拜拜pristine.ame.xx.com IMAP4rev1服务器终止连接
A8正常注销完成
A2注销
*拜拜pristine.ame.xx.com IMAP4rev1服务器终止连接
A2正常注销完成
调试：IMAPStore连接已断开
调试：IMAPStore清理，强制false
调试：IMAPStore清理完成
//还有一堆这些。。。
正在监视传入的电子邮件。。。
IMAP调试：IMAPProtocol noop
A33努普
A33 OK NOOP已完成
IMAP调试：IMAPProtocol noop
A77努普
A77 OK NOOP已完成
A78删除
A78 OK没有删除任何消息，因此不需要更新
正在监视传入的电子邮件。。。
IMAP调试：IMAPProtocol noop
A34努普
A34 OK NOOP已完成
IMAP调试：IMAPProt
// first attempt to read mail when program starts

DEBUG: JavaMail version 1.4.3
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smt
ps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSP
ORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STOR
E,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,
pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,
com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.m
ail.pop3.POP3Store,Sun Microsystems, Inc]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,S
un Microsystems, Inc], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], smtps=jav
ax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], pop3=javax.mail.Provider[STO
RE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3
SSLStore,Sun Microsystems, Inc], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystem
s, Inc]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems,
Inc]
DEBUG: mail.imap.fetchsize: 16384
DEBUG: mail.imap.statuscachetimeout: 1000
DEBUG: mail.imap.appendbuffersize: -1
DEBUG: mail.imap.minidletime: 10
DEBUG: trying to connect to host "10.128.200.85", port 143, isSSL false
* OK [CAPABILITY IMAP4REV1 LOGIN-REFERRALS STARTTLS AUTH=LOGIN] pristine.ame.xx.com IMAP4rev1 2001.315rh at Mon, 30 Dec 2013 11:15:26 -0500 (EST)
IMAP DEBUG: AUTH: LOGIN
DEBUG: protocolConnect login, host=10.128.200.85, user=venuswmpublic, password=<non-null>
A0 AUTHENTICATE LOGIN
+ VXNlciBOYW1lAA==
dmVudXN3bXB1YmxpYw==
+ UGFzc3dvcmQA
d2VibTEyMzQ=
A0 OK [CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND] User venuswmpublic authenticated
A1 LIST "" INBOX
* LIST (\NoInferiors) NIL INBOX
A1 OK LIST completed
DEBUG: connection available -- size: 1
A2 SELECT INBOX
* 0 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1] UID validity status
* OK [UIDNEXT 1] Predicted next UID
* FLAGS (\Answered \Flagged \Deleted \Draft \Seen)
* OK [PERMANENTFLAGS ()] Permanent flags
A2 OK [READ-WRITE] SELECT completed
A3 EXPUNGE
A3 OK EXPUNGE completed
Monitoring incoming email...
* OK [CAPABILITY IMAP4REV1 LOGIN-REFERRALS STARTTLS AUTH=LOGIN] pristine.ame.xx.com IMAP4rev1 2001.315rh at
Mon, 30 Dec 2013 11:15:38 -0500 (EST)
IMAP DEBUG: AUTH: LOGIN
A0 AUTHENTICATE LOGIN
+ VXNlciBOYW1lAA==
dmVudXN3bXB1YmxpYw==
+ UGFzc3dvcmQA
d2VibTEyMzQ=
A0 OK [CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND] User venuswmpublic authenticated
IMAP DEBUG: IMAPProtocol noop
A1 NOOP
A1 OK NOOP completed
IMAP DEBUG: IMAPProtocol noop
A4 NOOP
A4 OK NOOP completed
A5 EXPUNGE
A5 OK EXPUNGE completed
A6 EXPUNGE
A6 OK EXPUNGE completed
DEBUG: pool is full, not adding an Authenticated connection
A7 CLOSE
A7 OK CLOSE completed
A8 LOGOUT
* BYE pristine.ame.xx.com IMAP4rev1 server terminating connection
A8 OK LOGOUT completed
A2 LOGOUT
* BYE pristine.ame.xx.com IMAP4rev1 server terminating connection
A2 OK LOGOUT completed
DEBUG: IMAPStore connection dead
DEBUG: IMAPStore cleanup, force false
DEBUG: IMAPStore cleanup done

// and a bunch of these...

Monitoring incoming email...
IMAP DEBUG: IMAPProtocol noop
A33 NOOP
A33 OK NOOP completed
IMAP DEBUG: IMAPProtocol noop
A77 NOOP
A77 OK NOOP completed
A78 EXPUNGE
A78 OK No messages deleted, so no update needed
Monitoring incoming email...
IMAP DEBUG: IMAPProtocol noop
A34 NOOP
A34 OK NOOP completed
IMAP DEBUG: IMAPProtocol noop
A79 NOOP
A79 OK NOOP completed
A80 EXPUNGE
A80 OK No messages deleted, so no update needed
etc...


------------------------------------

// If I send in an email while the program is running, it picks it up, but still leaves the previous ones unread in the inbox.

Monitoring incoming email...
IMAP DEBUG: IMAPProtocol noop
A4 NOOP
A4 OK NOOP completed
IMAP DEBUG: IMAPProtocol noop
A10 NOOP
* 1 EXISTS
* 1 RECENT
* OK [UIDVALIDITY 1388420519] UID validity status
* OK [UIDNEXT 2] Predicted next UID
* FLAGS (\Answered \Flagged \Deleted \Draft \Seen)
* OK [PERMANENTFLAGS (\* \Answered \Flagged \Deleted \Draft \Seen)] Permanent flags
* OK [READ-WRITE] Mailbox status
* OK [UNSEEN 1] first unseen message in /var/spool/mail/venuswmpublic
A10 OK NOOP completed
A11 EXPUNGE
A11 OK Mailbox checkpointed, but no messages expunged
A12 STORE 1 +FLAGS (\Flagged)
* 1 FETCH (FLAGS (\Recent \Flagged))
A12 OK STORE completed
A13 FETCH 1 (ENVELOPE INTERNALDATE RFC822.SIZE)
* 1 FETCH (ENVELOPE ("Mon, 30 Dec 2013 19:43:42 +0000" "test.testService"
* (("LName, FName" NIL "FName.LName" "Company.com")) (("LName, FName" NIL "FName.LName"
"Company.com")) (("LName, FName" NIL "FName.LName" 
"Company.com")) (("venuswmpublic@pristine.ame.xx.com" NIL "venuswmpublic" "pristine.ame.xx.com")) NIL NI
L NIL "<DAF6C79D86A80C49A9F66B898B2821A327FD50E6@hqmbx6.eur.ad.sag>") INTERNALDATE "30-Dec-2013 11:21:51 -0500" RFC822.S
IZE 3774)
A13 OK FETCH completed
A14 FETCH 1 (BODYSTRUCTURE)
* 1 FETCH (BODYSTRUCTURE (("TEXT" "PLAIN" ("CHARSET" "us-ascii") NIL NIL "QUOTED-PRINTABLE" 15 1 NIL NIL NIL
)("TEXT" "HTML" ("CHARSET" "us-ascii") NIL NIL "QUOTED-PRINTABLE" 1899 60 NIL NIL NIL) "ALTERNATIVE" ("BOUNDARY" "_000_D
AF6C79D86A80C49A9F66B898B2821A327FD50E6hqmbx6euradsag_") NIL "EN-US"))
A14 OK FETCH completed
A15 FETCH 1 (BODY[1]<0.15>)
* 1 FETCH (BODY[1]<0> {15}
a=3D111111111
)
* 1 FETCH (FLAGS (\Recent \Seen \Flagged))
A15 OK FETCH completed
A16 FETCH 1 (BODY[1]<0.15>)
* 1 FETCH (BODY[1]<0> {15}
a=3D111111111
)
A16 OK FETCH completed
A17 FETCH 1 (BODY[2]<0.1899>)
* 1 FETCH (BODY[2]<0> {1899}
<html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr=
osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:=
//www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
<meta name=3D"Generator" content=3D"Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
    {font-family:Calibri;
    panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
    {font-family:"Trebuchet MS";
    panose-1:2 11 6 3 2 2 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
    {margin:0in;
    margin-bottom:.0001pt;
    font-size:11.0pt;
    font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
    {mso-style-priority:99;
    color:blue;
    text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
    {mso-style-priority:99;
    color:purple;
    text-decoration:underline;}
span.EmailStyle17
    {mso-style-type:personal-compose;
    font-family:"Trebuchet MS","sans-serif";
    color:windowtext;
    font-weight:normal;
    font-style:normal;
    text-decoration:none none;}
.MsoChpDefault
    {mso-style-type:export-only;
    font-family:"Calibri","sans-serif";}
@page WordSection1
    {size:8.5in 11.0in;
    margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
    {page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,&quot;sans-serif&quot;">a=3D111111111<o:p></o:p></span></p=
>
</div>
</body>
</html>
)
A17 OK FETCH completed
A18 FETCH 1 (BODY[1]<0.15>)
* 1 FETCH (BODY[1]<0> {15}
a=3D111111111
)
A18 OK FETCH completed
DEBUG: JavaMail version 1.4.3
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smt
ps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSP
ORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STOR
E,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,
pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,
com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.m
ail.pop3.POP3Store,Sun Microsystems, Inc]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,S
un Microsystems, Inc], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], smtps=jav
ax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], pop3=javax.mail.Provider[STO
RE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3
SSLStore,Sun Microsystems, Inc], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystem
s, Inc]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
2013-12-30 14:43:53 EST [ISS.0015.0005D] Invoking service test.testService.
2013-12-30 14:43:53 EST [ISP.0090.0001C] --- 
2013-12-30 14:43:53 EST [ISP.0090.0001C] --- test.testService EXECUTED !!!
2013-12-30 14:43:53 EST [ISP.0090.0001C] --- 
A19 STORE 1 +FLAGS (\Deleted)
* 1 FETCH (FLAGS (\Recent \Seen \Deleted \Flagged))
A19 OK STORE completed
A20 EXPUNGE
* 1 EXPUNGE
* 0 EXISTS
* 0 RECENT
A20 OK Expunged 1 messages