當我利用VirtualBox架設虛擬機器時，會發現沒辦法正常地使用註冊信的功能。這是因為虛擬機器內部的domain name並不是其他domain name server認可的名稱，只是我測試用的名字。此時可以自行在伺服器當中新增此domain name，對應到127.0.0.1，也就是本機端，就可以解決此問題。
以下詳述這個問題的發生與解決過程。
虛擬機器中DSpace的郵件設定
##### Email settings ######
# SMTP mail server
mail.server = 127.0.0.1
# SMTP mail server authentication username and password (if required)
# mail.server.username = myusername
# mail.server.password = mypassword
# SMTP mail server alternate port (defaults to 25)
mail.server.port = 25
# From address for mail
mail.from.address = dspace-noreply@dspace-dlll.nccu.edu.tw
# Currently limited to one recipient!
feedback.recipient = dspace-help@dspace-dlll.nccu.edu.tw
# General site administration (Webmaster) e-mail
mail.admin = dspace-help@dspace-dlll.nccu.edu.tw
必須說明到，上述設定當中的「dspace-dlll.nccu.edu.tw」完全沒有註冊在任何domain name server當中。因此執行時就會發生錯誤。
2009-10-02 23:58:27,828 INFO org.dspace.app.webui.servlet.RegisterServlet @ anonymous:session_id=29633B32BF10EEEF95FCF4DC71B5C7FD:ip_addr=10.0.2.2:sendtoken_register:email=puddingchen.35@gmail.com
2009-10-02 23:58:30,669 INFO org.dspace.app.webui.servlet.RegisterServlet @ anonymous:session_id=29633B32BF10EEEF95FCF4DC71B5C7FD:ip_addr=10.0.2.2:error_emailing:email=puddingchen.35@gmail.com
javax.mail.MessagingException: 501 5.0.0 HELO requires domain address
at com.sun.mail.smtp.SMTPTransport.issueCommand(SMTPTransport.java:1363)
at com.sun.mail.smtp.SMTPTransport.helo(SMTPTransport.java:838)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:375)
at javax.mail.Service.connect(Service.java:275)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at javax.mail.Transport.send0(Transport.java:168)
at javax.mail.Transport.send(Transport.java:98)
at org.dspace.core.Email.send(Email.java:362)
at org.dspace.eperson.AccountManager.sendEmail(AccountManager.java:296)
at org.dspace.eperson.AccountManager.sendInfo(AccountManager.java:256)
at org.dspace.eperson.AccountManager.sendRegistrationInfo(AccountManager.java:101)
at org.dspace.app.webui.servlet.RegisterServlet.processEnterEmail(RegisterServlet.java:287)
at org.dspace.app.webui.servlet.RegisterServlet.doDSPost(RegisterServlet.java:202)
at org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:147)
at org.dspace.app.webui.servlet.DSpaceServlet.doPost(DSpaceServlet.java:105)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
In recent days, I taught students how to use DSpace-DLLL to archive items, organize communities and collections, design submission input forms (metadata schema). I public my teaching materials in this article.
# TYPE DATABASE USER CIDR-ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all trust #ident sameuser
# IPv4 local connections:
host all all 127.0.0.1/32 trust #ident sameuser
# IPv6 local connections:
host all all ::1/128 trust #ident sameuser
# for DSpace
host dspace dspace 127.0.0.1 trust #255.255.255.
# TYPE DATABASE USER CIDR-ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all md5 #ident sameuser
# IPv4 local connections:
host all all 127.0.0.1/32 md5 #ident sameuser
# IPv6 local connections:
host all all ::1/128 md5 #ident sameuser
host dspace dspace 127.0.0.1 password #255.255.255.255
<field>
<dc-schema>dc</dc-schema>
<dc-element>contributor</dc-element>
<dc-qualifier>authorAddress</dc-qualifier>
<repeatable>true</repeatable>
<label>Author Address</label>
<input-type>taiwanaddress</input-type>
<hint>Enter the address of the author of this item below.</hint>
<required></required>
</field>
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