$ telnet localhost 10025 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 localhost.localdomain JAMES SMTP Server Server (JAMES SMTP Server ) ready helo example.com 250 localhost.localdomain Hello example.com [127.0.0.1])
Entries tagged [james]
Configuring helo names of James
TweetPosted on Friday Feb 06, 2015 at 04:47PM in Technology
My James instance looks like failed to determine its hostname as follows:
This can be solved by editing XML files such as smtpserver.xml, pop3server.xml and imapserver.xml respectively as follows:
<helloName autodetect="false">www.nailedtothex.org</helloName>
Also you should check that the name which James will use during communicate to another SMTP server. you can check it easily with this site. if the name is wrong, this may be a cause of that remote server will consider your James server as spammer. the name to use will be hostname of the server. you can check it with simply issuing hostname command on Linux.
Unfortunately you can’t set the hostname in portable way due to a bug in a dependency geronimo-javamail_1.4_mail. the hostname should be able to configured in mailetcontainer.xml as follows but not worked at the present time.
<!-- Set the HELO/EHLO name to use when connectiong to remote SMTP-Server --> <mail.smtp.localhost>www.nailedtothex.org</mail.smtp.localhost>
So current geronimo-javamail_1.4_mail ignores that value. considerable solutions are following:
-
Change the hostname of the server (for <= Java 7u51)
-
Put you FQDN first (before
localhost) in/etc/hosts. detail (for recent Java) -
Apply a patch to Geronimo JavaMail and update dependency of James. unfortunately seems like that fixed version of Geronimo JavaMail is not released yet.
Tags: james
Disabling SpamAssassin on James
TweetPosted on Friday Feb 06, 2015 at 03:00PM in Technology
I’m using revision number 1657019 in the SVN trunk of James3. I see an error in james-server.log at every receiving of emails as follows:
INFO 14:41:51,912 | james.mailetcontext | Error communicating with spamd on localhost:783 Exception: java.net.ConnectException: Connection refused
It seems like that James is trying to connect to local SpamAssassin instance, but I have no SpamAssassin instance on my server yet so I simply deleted following definition from mailetcontainer.xml.
<mailet notmatch="SenderHostIsLocal" class="SpamAssassin"> <spamdHost>localhost</spamdHost> <spamdPort>783</spamdPort> </mailet>
Now the exception disappeared.
Tags: james
Defining aliases on James
TweetPosted on Friday Feb 06, 2015 at 02:47PM in Technology
I’m using James3 in SVN trunk revision number 1657019.
Adding a user to recipient rewrite table
This forwards a address postmaster@example.com to kyle@example.com:
./james-cli.sh -p 9999 -h localhost addaddressmapping postmaster example.com kyle@example.com
Defining postmaster address
James replaces a particular address postmaster by PostmasterAlias according to XML definition on some environment, so we need to set correct email address to it. in $JAMES_HOME/mailetcontainer.xml as follows:
<mailetcontainer enableJmx="true">
<!-- MailAddress used for PostMaster -->
<context>
<postmaster>kyle@example.com</postmaster>
</context>
...
Tags: james
Updating and Configuring Derby shipped with James
TweetPosted on Friday Feb 06, 2015 at 02:30PM in Technology
Put latest Derby jars
I used derby.jar and derbynet.jar of 10.11.1.1 to accept network connections. put these jars you needed into $JAMES_HOME/lib.
Define that jars to wrapper.conf
Comment out following line in $JAMES_HOME/conf/wrapper.conf:
#wrapper.java.classpath.94=%REPO_DIR%/derby-10.9.1.0.jar
Then put following line:
wrapper.java.classpath.94=%REPO_DIR%/derby.jar
Make Derby to accept network connections
Add following line to $JAMES_HOME/conf/wrapper.conf.
wrapper.java.classpath.131=%REPO_DIR%/derbynet.jar
Also additional system properties are needed:
wrapper.java.additional.15=-Dderby.drda.startNetworkServer=true wrapper.java.additional.16=-Dderby.drda.portNumber=11527
Config derby.log
I prefer to place derby.log into $JAMES_HOME/log, and append log to exist one.
wrapper.java.additional.17=-Dderby.stream.error.file=../log/derby.log wrapper.java.additional.18=-Dderby.infolog.append=true
Define shutdown hook of Derby
Lob streaming is not supported
Currently OpenJPA, James’s JPA provider, is not supported lob streaming for Derby. James stored mail data in lob so If you frequently use larger mails, consider using other databases instead of Derby.
Installing James as a service of CentOS
TweetPosted on Thursday Feb 05, 2015 at 05:16PM in Technology
In previous posting, I set up James as a plain standalone application on OS X. this time I’m going to install James as a service on CentOS 6.6, and expose its SMTP, POP3 and IMAP ports to external network.
Create a user for James
The java process of James will run james user which added in this step.
sudo useradd james
Extract tarball
I’ll use james-server-app-3.0.0-beta5-SNAPSHOT-app.tar.gz which built in previous posting.
sudo tar zxvf james-server-app-3.0.0-beta5-SNAPSHOT-app.tar.gz -C /usr/local --no-same-owner sudo chown -R james:james /usr/local/james-server-app-3.0.0-beta5-SNAPSHOT sudo ln -s /usr/local/james-server-app-3.0.0-beta5-SNAPSHOT /usr/local/james
Change ports that James will listen
Add offset of 10000 to bind element in smtpserver.xml, pop3server.xml and imapserver.xml respectively as I did in previous posting.
Reduce heap size
Default maximum heap size of James is 512MB but it’s too large for me because I have only small amount of memory on the server so I reduced it to more smaller. this can be done with modifying the file $JAMES_HOME/conf/wrapper.conf as follows:
wrapper.java.maxmemory=256
Define user to startup script
In $JAMES_HOME/bin/james there’s a variable which defines the user to run the process of James. so set it to james as follows:
RUN_AS_USER=james
Register the startup script
sudo ln -s /usr/local/james/bin/james /etc/init.d sudo chkconfig --add james sudo chkconfig james on
Now we can control James with service command as follows:
sudo service james start sudo service james stop
Also James will be launched / shutdown automatically at every boot/shutdown process of CentOS.
NOTE on some environment, following error may occur.
$ sudo service james start Starting Apache James :: Server :: App... /usr/local/james-server-app-3.0.0-beta5-SNAPSHOT/bin/james: /usr/local/james-server-app-3.0.0-beta5-SNAPSHOT/bin/./wrapper-linux-x86-32: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory $
According to this discussion, it related to the environment which used in build. then the problem should be fixed with issuing following command:
sudo yum install glibc.i686
Configure port forwarding
This makes SMTP, POP3 and IMAP ports to be forwarded to ports of James listening. this enables us to launch James process as a regular user owning process, not root process. here’s an example of /etc/sysconfig/iptables:
*nat :PREROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A PREROUTING -i eth0 -p tcp --dport 25 -j DNAT --to-destination :10025 -A PREROUTING -i eth0 -p tcp --dport 110 -j DNAT --to-destination :10110 -A PREROUTING -i eth0 -p tcp --dport 143 -j DNAT --to-destination :10143 COMMIT *filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 10025 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 10110 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 10143 -j ACCEPT COMMIT
After update the /etc/sysconfig/iptables file, restart the iptables serivce as follows:
sudo service iptables restart
Remaining tasks such as registering shutdown hook of Derby, creating domains, users…
NOTE: You should make James to use secured connection
Currently all of communication between the server and client is clear text so any data including credentials can be sniffed. I would try to configure James to use secured connection in another post later.