this is obsolete doc -- see http://doc.nethence.com/ instead

Setting up DavMail as standalone server (MS Exchange proxy) with SSL enabled 

http://pbraun.nethence.com/unix/mail/davmail.html 

http://pbraun.nethence.com/unix/sysutils_linux/systemd.html 

Introduction 

I only need DavMail to access Exchange calendar service from Thunderbird/Lightning. Everything else works directly: 

  SMTP & IMAP --> Exchange directly 

  LDAP addressbook --> AD directly on port 3268 (need to switch to LDAPS 3269) 

Requirements 

Make sure Java is installed (using java-1.8.0-openjdk), 

  yum -y install java 

you will probably need X11 forwarding too (enabled by default on CentOS), 

  yum -y install xauth 

Disable listen on port 25 to free that port, 

cd /etc/postfix/ 

cp master.cf master.cf.dist 

vi master.cf 

#smtp inet n - n - - smtpd 

  service postfix restart 

If you need SSL, upload you java keystore or your apache pem to the server. 

Installation 

Fetch the [latest tarball](http://sourceforge.net/projects/davmail/files/davmail/) and extract, 

  tar xzf davmail-linux-x86_64-4.7.1-2416.tgz 

  mv davmail-linux-x86_64-4.7.1-2416/ /usr/local/ 

  mv svrkeystore.jks /usr/local/davmail-linux-x86_64-4.7.1-2416/ 

  ls -l /usr/local/davmail/svrkeystore.jks 

  cd /usr/local/ 

  ln -s davmail-linux-x86_64-4.7.1-2416 davmail 

Configuration 

Test that the tool is working normally in graphical mode and proceed with its setup, 

  /usr/local/davmail/davmail.sh ==> DavMail Gateway Settings 

  Main tab / OWA URL: https://mailexchange-server.domain.tld/owa/ 

  Main tab / Caldav HTTP 443 (keep ssl enabled) 

  Network tab / Allow Remote Connections 

  Encryption tab / store type: JKS 

  Encryption tab / keystore: /usr/local/davmail/svrkeystore.jks 

  Encryption tab / keystore pass: ... 

  Encryption tab / key pass: ... 

==> save do some CalDav testing with Thunderbird/Lightning. 

Once everything works fine, save the configuration and enable server mode, 

  cd ~/ 

  ls -l .davmail.properties 

  mv .davmail.properties /usr/local/davmail/davmail.properties.gui 

  cd /usr/local/davmail/ 

  sed 's/davmail.server=false/davmail.server=true/' davmail.properties.gui > davmail.properties.server-mode 

  diff davmail.properties.gui davmail.properties.server-mode 

  grep -i url davmail.properties.server-mode 

  grep Port davmail.properties.server-mode 

Ready to go 

You can now run the tool as a deaemon, 

  cd /usr/local/davmail/ 

  ps ax | grep davmail 

  nohup ./davmail.sh davmail.properties.server-mode > davmail.more.log 2> davmail.more-err.log & 

Check that it's now listeing on the desired ports, 

  netstat -an --inet --inet6 | grep 443 

Start/stop scripts, 

mkdir -p ~/bin/ 

cd ~/bin/ 

vi start_davmail.ksh 

#!/bin/ksh 

print Starting DavMail: 

cd /usr/local/davmail/ 

nohup ./davmail.sh davmail.properties.server-mode > davmail.more.log 2> davmail.more-err.log & 

ps aux | grep davmail | grep -v grep 

vi stop_davmail.ksh 

#!/bin/ksh 

print Shuting down DavMail... \\c 

pid=`ps ax | grep davmail | grep -v grep | awk '{print $1}'` 

[[ -z $pid ]] && print no pid found && exit 1 

kill $pid && print Done 

sleep 1 

ps aux | grep davmail | grep -v grep 

vi status_davmail.ksh 

#!/bin/ksh 

ps aux | grep davmail | grep -v grep 

chmod +x start_davmail.ksh status_davmail.ksh stop_davmail.ksh 

Thunderbird configuration 

with SSL enabled on the server 

For Calendar (lightning), 

  click on the little calendar icon on the top right corner 

  File > New > Calendar 

  on the network 

  caldav 

  location: https://davmail.examplessl.net/users/long-email@addomain.tld/calendar 

  offline ok 

  name: COMPANY 

  Email: select the mail account 

Note. the https address needs to point to the SSL enabled FQDN, otherwise it won't work. 

Wait for a second and your corporate calendar will show up. Eventually uncheck your persoan Calendar to let the corporate one enabled only. 

Additional notes 

To LDAP search only users, 

  Advanced / (&(objectclass=user)(msexchuserAccountcontrol=0)) 

References 

DavMail Setup as a standalone server: http://davmail.sourceforge.net/serversetup.html 

DavMail : la passerelle Exchange: https://doc.ubuntu-fr.org/davmail 

https://www.arclab.com/en/kb/email/list-of-smtp-and-imap-servers-mailserver-list.html 

https://www.arclab.com/en/kb/email/list-of-smtp-and-pop3-servers-mailserver-list.html 

https://www.siteground.com/tutorials/email/pop3-imap-smtp-ports.htm 

Understanding LDAP Search Filters: https://fr.websense.com/content/support/library/web/hosted/dsc_admin/query_filter.aspx 

http://social.technet.microsoft.com/wiki/contents/articles/5392.active-directory-ldap-syntax-filters.aspx 

https://technet.microsoft.com/fr-fr/library/aa996205(v=exchg.65).aspx 

Integrate Thunderbird with Active Directory: https://www.howtoforge.com/thunderbird_active_directory