javamail: why IMAPStore.connect switch to port 993 even if mail.imap.ssl.enable=false and port=143? -

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in following code (an ibm domino 9.0.1 java agent) trying connect via port 143 no ssl imap store.

package com.fm; import javax.mail.internet.*; import javax.mail.*; import java.net.connectexception; import java.util.*; public class jsaveimap {     private store store=null;     private string host;     private string port;     private string user;     private string password;     private javax.mail.session mailsession=null;     private boolean dodebug;       public jsaveimap() {         system.out.println("creato oggetto");     }      public void savemessage(mimemessage message, string foldername) throws messagingexception      {         //http://stackoverflow.com/questions/11524716/save-draft-message-using-java-mail-api          folder folder=null;         if (foldername.length()>0) {             folder= store.getfolder(foldername);         } else {             folder= store.getfolder("inbox");         }                if (dodebug) {system.out.println("folder aperto:" + folder.getfullname());}         folder.open(folder.read_write);         //draftmessage.setflag(flag.draft, true);         mimemessage arrmessage[] = {message};         folder.appendmessages(arrmessage);         folder.close(false);         folder=null;     }      public boolean connect(string phost, string pport, string puser, string ppassword,boolean dodebug) {         boolean retval=false;         this.dodebug=dodebug;         if (dodebug) {system.out.println(this.getclass().getname()+ ".connect");}         if (!(phost.equalsignorecase(host) && pport.equalsignorecase(port) && puser.equalsignorecase(user) && ppassword.equalsignorecase(password))) {             // parametri differenti, resetta connessione precedente             recycle();             host=phost;             port=pport;             user=puser;             password=ppassword;         }         system.out.println("host: " + host + ", port: " + port + ", user: " + user + ", password: " + password);         try {             system.out.println(this.getclass().getname() + " connettiamo?");             //properties props = system.getproperties();                     properties props =new properties();         //nuove proprietà per non avere conflitti con quelle gia in uso ad altri account imap             props.setproperty("mail.store.protocol", "imap");             if (port.length()>0) {                 props.setproperty("mail.imap.port", port);             }             props.setproperty("mail.imap.ssl.enable", "false");         //credo che non serva, oltretutto default =false, poi dovrebbe venire parametrico dall'account             props.setproperty("mail.imap.connectiontimeout", "5000");             props.setproperty("mail.imap.timeout", "5000");             mailsession = session.getdefaultinstance(props, null);              if (dodebug) {                 system.out.println("proprietà correnti ************************************************************");                 enumeration keys = props.keys();                 while (keys.hasmoreelements()) {                     string key = (string)keys.nextelement();                     string value = (string)props.get(key);                     system.out.println(key + ": " + value);                 }             }              if ( dodebug) { mailsession.setdebug(true); }             store = mailsession.getstore("imap");             //store=mailsession.getstore(new urlname("imap",host,integer.parseint(port),null,user,password));             //store.connect(host, user, password);             store.connect(host, integer.parseint(port), user, password);             system.out.println("connesso allo store "+ host + " " +user);             retval=true;         } catch(nosuchproviderexception ne) {             system.out.println("exception in class " + ne.getstacktrace()[0].getclassname() +                      " method: "+ ne.getstacktrace()[0].getmethodname()+                      ", row: " + ne.getstacktrace()[0].getlinenumber() + ": " + ne.tostring());              //questa eccezione non la gestisco perchè è nel caso in cui il provider non supporti             // il protocollo. lo escludo per ora                          ne.printstacktrace();             //throw new messagingexception("errore nella connessione al provider");         } catch (messagingexception ne) {             //throw new messagingexception ("messagingexception durante connessione:"+e.getmessage(),e);             system.out.println("exception in class " + ne.getstacktrace()[0].getclassname() +                      " method: "+ ne.getstacktrace()[0].getmethodname()+                      ", row: " + ne.getstacktrace()[0].getlinenumber() + ": " + ne.tostring());             ne.printstacktrace();          } catch (exception ne) {             system.out.println("exception in class " + ne.getstacktrace()[0].getclassname() +                      " method: "+ ne.getstacktrace()[0].getmethodname()+                      ", row: " + ne.getstacktrace()[0].getlinenumber() + ": " + ne.tostring());             ne.printstacktrace();         }         if (dodebug) system.out.println("connect terminata");          return retval;     }      public void recycle() {         try {             host="";             port="";             user="";             password="";             //if (folder.isopen()) { folder.close(true);}             if (store!=null) {                 if (store.isconnected()) {store.close();}             }          } catch (exception ne) {             system.out.println("exception in class " + ne.getstacktrace()[0].getclassname() +                      " method: "+ ne.getstacktrace()[0].getmethodname()+                      ", row: " + ne.getstacktrace()[0].getlinenumber() + ": " + ne.tostring());         }      }  }

why getting exception port 993 in message

couldn't connect host, port: 172.17.0.247, 993;

output:

proprietà correnti ************************************************************ mail.imap.port: 143 mail.imap.ssl.enable: false mail.imap.timeout: 5000 mail.imap.connectiontimeout: 5000 mail.store.protocol: imap debug: setdebug: javamail version 1.5.4 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: closefoldersonstorefailure **debug imap: trying connect host "172.17.0.247", port 143, ** isssl false exception in class com.sun.mail.imap.imapstore method: protocolconnect, row: 731: com.sun.mail.util.mailconnectexception: couldn't connect host,  **port: 172.17.0.247, 993; timeout 5000;** nested exception is:  java.net.connectexception: connection refused: connect agent manager: agent  error: com.sun.mail.util.mailconnectexception: couldn't connect host, port: 172.17.0.247, 993; timeout 5000;   nested exception is:  java.net.connectexception: connection refused: connect agent manager: agent  error:  @ com.sun.mail.imap.imapstore.protocolconnect(imapstore.java:731) agent manager: agent  error:  @ javax.mail.service.connect(service.java:364) agent manager: agent  error:  @ com.fm.jsaveimap.connect(jsaveimap.java:86)

it getdefaultinstance behaviour due previous imap connection

how change javamail port


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