Email Notes

Glossary

--------



Sending User:

An entity creating and sending messages to another entity.



Reading User:

An entity reading, archiving, and deleting messages from another entity.



Mail User Agent (MUA):

An application used by Sending Users to compose and dispatch messages.



An application used by Reading Users to read, archive, and delete messages

that have been received.



Mail Transport Agent (MTA):

A server used to send, receive, and forward messages from one location

to another.



Mail Delivery Agent (MDA):

A server used to store messages into User Mail Boxes.



Remove Mail Box Server:

A server used to allow remote access to a User Mail Box for reading,

archiving and deleting messages.



User Mail Box:

A collection of messages usually stored on secondary memory, like hard

drives.  A mail box may be stored as a single file, a collection of files

and directories, or in a database.



Several standard mail box formats exist. The two common formats in the

open-source world are "mbox" and "maildir". The mbox format stores all

messages in a single file, while the maildir format stores messages in

a collection of files and directories.













Files, Directories and Configurations Of Interest

-------------------------------------------------

Configuration

-------------

/etc/exim4/

/etc/exim4/exim4.conf.template

/etc/exim4/update-exim4.conf.conf

/var/lib/exim4/config.autogenerated

/etc/mailname

/etc/aliases

/home/username/.muttrc

/home/username/.forward



Logs

-------------

/var/log/exim4/mainlog

/var/log/exim4/rejectlog



Mailboxes

-------------

/var/spool/mail/username

/home/username/mbox

/home/username/Mail/





Step-by-step instructions

-------------------------



SMTP (MTA) Exim4 on Ubuntu Feisty

--------------------------

1- Install exim4.

   # apt-get install exim4



2- reconfigure to receive email directly, and to send via a smart host



   # dpkg-reconfigure exim4-config

     Small files: No

     Type of configuration: mail sent by smarthost; recevied via SMTP or fetchmail

     System mail name: your mail domain (mine is horgoth.com)

     IP-Address to listen on: your ip address (mine is 144.38.212.50)

     Other destinations: your mail domain (mine is horgoth.com)

     Machines to relay for: * See note below

     smarthost: sol.cs.dixie.edu

     Hide local mail name: No

     Minimal DNS Queries: No



   * NOTE ON RELAYS

     If only command line MUAs on the same system as the MTA

     will be used to send email, then the relay list should be

     left blank.

    

     To allow MUAs from the local network to use the

     MTA to send outgoing email, the local network will need

     to be identified.  The local network in the CIT lab

     is 144.38.192.0/19.  My local network is 144.38.212.48/28w.

     Other specific IP addresses may also be added.  (See

     step 3 below for another method of achieving this result.)

    

3- Allow local network computers to send email out.

   # emacs /etc/exim4/update-exim4.conf.conf

   Edit the relay_nets line.  This configures hosts that you will accept

   SMTP sending from. (Outlook, etc.)

   dc_relay_nets=' is already installed'



4- Update the real exim4 configuration file(s)

   # update-exim4.conf

  

5- Restart the server with the new configuration

   # /etc/init.d/exim4 restart



  

SMTP (MTA) Exim4 on Ubuntu Feisty

Satellite Systems

--------------------------

1- Install exim4.

   # apt-get install exim4



2- reconfigure to not receive email, and to send via a smart host



   # dpkg-reconfigure exim4-config

     Small files: No

     Type of configuration: mail sent by smarthost; no local mail

     System mail name: This hosts dns name (mine is ns1.horgoth.com)

     IP-Address to listen on: your ip address (mine is 127.0.0.1)

     Other destinations: your mail domain (mine is empty for no local delivery)

     Visible domain name for local users: The domain name (mine is horgoth.com)

     smarthost: your domain's MTA (mine is eax.horgoth.com)

     Minimal DNS Queries: No

    

  

IMAP4 uw-imapd on Ubuntu Feisty

------------------------------

1- Install the "internet super-server" package inetd, and the access

   control facilty package tcpd.

   # apt-get install tcpd netkit-inetd



2- Install the uw-imapd package

   Other packages may be required for uw-imapd to work correctly.

   They should be automatically installed by apt-get.

  

   # apt-get install uw-imapd

     Continue installing libc-client without Maildir support?  Yes

     Which ports should the server listen on? imaps

     Enforce port selection? No

    



MUA mutt for local mail on Ubuntu Feisty

---------------------------------------

1- Install the mutt package

   # apt-get install mutt

2- Install the mailx package

   # apt-get install mailx



  

MUA mutt for remote mail on Ubuntu Feisty

---------------------------------------

1- Install the mutt package

   # apt-get install mutt



2- Configure .muttrc to use the remote server

   $ emacs ~/.muttrc

   Add these lines:

  

   ## begin  imap ##

   set imap_authenticators="gssapi:cram-md5:login"

   set imap_force_ssl=yes

   set imap_user="username"

   #set imap_pass="password"



   # put your server name here:

   set spoolfile="imaps://horgoth.com"

   # put your server name here:

   set folder="imaps://horgoth.com/"



   set header_cache="~/.mutt_header_cache/"

   ## end    imap ##

  

  

MUA Outlook Express for remote mail on Windows

----------------------------------------------

1- Tools/Accounts...

2- Add->Mail...

3- Display Name : Real name (mine is Emilio Lazardo)

4- E-mail address: email@address (mine is lazardo@horgoth.com)

5- Select IMAP server

   Incoming Server : your.server.name (mine is horgoth.com)

   Outgoing Server : your.server.name (mine is horgoth.com)

6- Account name: user account name on server (mine is lazardo)

   Password:     I choose to leave this blank since it is a login password too.

   Remember Password: uncheck

   Using SPA: uncheck

7- Select the new account listing, and choose "Properties"

8- Select the "Advanced" tab.

9- Underneath "Incoming mail", check the box for

   "This server requires SSL"

10- Click "Apply" and "OK" buttons.

11- Close the dialog box.





System-Wide Email Aliases

-------------------------

1- Edit /etc/aliases

2- Add lines to translate the user part of an email destined for

   this system.



   For example, the following line will translate bedrock@mydomain

   to send copies of messages to each of fred, wilma, and pebbles

   on the mydomain mail server as well as to barney@rubbledomain.



   bedrock: fred, wilma, pebbles, barney@rubbledomain



   The bedrock account will not receive a copy of the message.

   In fact, bedrock need not be an actual account or group.



  

Per-User Automated Forwarding

-----------------------------

1- Edit ~/.forward, insert the email address where this user

   wants to have all messages sent.

  

Now all email for this user's account will be forwarded on to

the new address.  The process is for the MDA to modify the

header fields of the message to send them to the address in

the .forward file.  It then sends the message by giving it

back to the MTA for delivery.



Note that the .forward file has more sophisticated uses,

including forwarding to multiple accounts, forwarding

while keeping a copy, and applying arbitrary processing

filters such as procmail.