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https://issues.apache.org/jira/browse/NET-650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16341799#comment-16341799
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Sebb commented on NET-650:
--------------------------

bq.  if you have directed something to use a proxy then you want the remote 
mapping of the name and not the local one.

Not necessarily.
There may be no remote mapping, so you might want to add your own local 
definition.
Also the code may not know that a proxy is being used.

As it stands, the constructor new InetSocketAddress(host, port) will use the 
local definition if there is one.
To force the use of the remote mapping, one would need to use 
InetSocketAddress. InetSocketAddress(host,port)

> IMAPClient over proxy doesn't properly resolve DNS
> --------------------------------------------------
>
>                 Key: NET-650
>                 URL: https://issues.apache.org/jira/browse/NET-650
>             Project: Commons Net
>          Issue Type: Bug
>          Components: IMAP
>    Affects Versions: 3.6
>            Reporter: Matthew McGillis
>            Priority: Major
>         Attachments: imapproxy.java, imapproxy2.java, socketproxy.java
>
>
> IMAPClient when configured to use a socks proxy is not able to resolve DNS 
> names through the proxy.
> See attached sample code, if I use it with:
> {noformat}
> $ java -DsocksProxyHost=localhost -DsocksProxyPort=16003 -cp 
> .:./commons-net-3.6.jar imapproxy imap.server.test.com user1 userpass
> connect error: java.net.UnknownHostException: imap.server.test.com: unknown 
> error
> {noformat}
> vs if I use it with the appropriate IP:
> {noformat}
> $ java -DsocksProxyHost=localhost -DsocksProxyPort=16003 -cp 
> .:./commons-net-3.6.jar imapproxy 10.250.3.127 user1 userpass
> * OK IMAP4rev1 proxy server ready
> IMAP: 10.250.3.127 143
> AAAA LOGIN *******
> AAAA OK [CAPABILITY IMAP4rev1 ACL BINARY CATENATE CHILDREN CONDSTORE ENABLE 
> ESEARCH ESORT I18NLEVEL=1 ID IDLE LIST-EXTENDED LIST-STATUS LITERAL+ 
> LOGIN-REFERRALS MULTIAPPEND NAMESPACE QRESYNC QUOTA RIGHTS=ektx SASL-IR 
> SEARCHRES SORT THREAD=ORDEREDSUBJECT UIDPLUS UNSELECT WITHIN XLIST] LOGIN 
> completed
> AAAB LOGOUT
> * BYE 10.250.3.127 Zimbra IMAP4rev1 server closing connection
> AAAB OK LOGOUT completed
> {noformat}



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