2.5. Exim

2.5.1. Exim Configuration

Exim come with default configuration we will change to mach system settings /etc/exim/exim.conf.

2.5.2. Certificates

Create private key, this example issues a certificate to core.privat-server.net, if you wish get a subdomain from afraid.org pointing to your public ip.

	$ sudo mkdir /etc/ssl/keys

	$ sudo openssl req -x509 -newkey rsa:2048 -keyout /etc/ssl/keys/exim.key -out /etc/ssl/certs/exim.cert -days 9000 -nodes
	Generating a 2048 bit RSA private key
	...........................................+++
	..............+++
	writing new private key to '/etc/ssl/keys/exim.key'
	-----
	You are about to be asked to enter information that will be incorporated
	into your certificate request.
	What you are about to enter is what is called a Distinguished Name or a DN.
	There are quite a few fields but you can leave some blank
	For some fields there will be a default value,
	If you enter '.', the field will be left blank.
	-----
	Country Name (2 letter code) [AU]:PT
	State or Province Name (full name) [Some-State]:
	Locality Name (eg, city) []:
	Organization Name (eg, company) [Internet Widgits Pty Ltd]:
	Organizational Unit Name (eg, section) []:
	Common Name (e.g. server FQDN or YOUR name) []:core.privat-server.net
	Email Address []:postmaster@core.privat-server.net
	#

	# chown mail:mail /etc/ssl/keys/exim.key
	# chmod 644 /etc/ssl/keys/exim.key
	# chmod 644 /etc/ssl/certs/exim.cert

2.5.3. Aliases

Exim come with default aliases we will change to mach system settings /etc/exim/aliases;

        # Default aliases file, installed by Exim. This file contains no real aliases.
        # You should edit it to taste.

        # The following alias is required by the mail RFCs 2821 and 2822.
        # Set it to the address of a HUMAN who deals with this system's mail problems.

        postmaster: c9admin

        # It is also common to set the following alias so that if anybody replies to a
        # bounce message from this host, the reply goes to the postmaster.

        mailer-daemon: postmaster

        # You should also set up an alias for messages to root, because it is not
        # usually a good idea to deliver mail as root.

        root: postmaster

        # It is a good idea to redirect any messages sent to system accounts so tha
        # they don't just get ignored. Here are some common examples:

        bin: root
        daemon: root
        ftp: root
        nobody: root
        operator: root
        uucp: root

        # You should check your /etc/passwd for any others.

        # Other commonly enountered aliases are:
        #
        # abuse:       the person dealing with network and mail abuse
        # hostmaster:  the person dealing with DNS problems
        # webmaster:   the person dealing with your web site

        ####

2.5.4. Smarthost

Tony Finch publish a nice configuration reference.

File /etc/exim/alias rewrite addresses when receiving, return_path and headers_rewrite rewrite addresses in header (envelop) while main rewrite apply rewriting to all.

Test sender rewriting;

        # exim -brw bob@box
        # exim -brw bob@remote.com

Test routing;

        # exim -bt bob@box
        # exim -bt bob@remote.com

2.5. Fetchmail

        $ prt-get depinst fetchmail

        $ sudo su
        # mkdir /var/lib/fetchmail
        # mkdir /var/run/fetchmail
        # useradd -r fetchmail
        # chown fetchmail /var/lib/fetchmail
        # chown fetchmail /var/run/fetchmail

Create /etc/rc.d/fetchmail and add fetchmail to /etc/rc.conf;

        #!/bin/sh
        #
        # /etc/rc.d/fetchmail: start/stop fetchmail daemon
        #

        SSD=/sbin/start-stop-daemon
        PROG=/usr/bin/fetchmail
        PID=/var/run/fetchmail/fetchmail.pid
        IDS=/var/lib/fetchmail/.fetchids
        PUID=45
        PGID=100
        OPTS="-f /etc/fetchmailrc -i $IDS --pidfile $PID --syslog -v"

        case $1 in
        start)
                $SSD --chuid $PUID:$PGID --user $PUID --exec $PROG --start -- $OPTS
                ;;
        stop)
                $SSD --stop --remove-pidfile --retry 10 --pidfile $PID
                ;;
        restart)
                $0 stop
                $0 start
                ;;
        reload)
                $SSD --stop --signal HUP --pidfile $PID
                ;;
        status)
                $SSD --status --pidfile $PID
                case $? in
                0) echo "$PROG is running with pid $(head -1 $PID)" ;;
                1) echo "$PROG is not running but the pid file $PID exists" ;;
                3) echo "$PROG is not running" ;;
                4) echo "Unable to determine the program status" ;;
                esac
                ;;
        *)
                echo "usage: $0 [start|stop|restart|reload|status]"
                ;;
        esac
        # End of file

Create /etc/fetchmailrc;

        # This file must be chmod 0600, owner fetchmail

        set daemon        300           # Pool every 5 minutes
        set syslog                      # log through syslog facility
        set postmaster  admin@box

        set no bouncemail               # avoid loss on 4xx errors
                                        # on the other hand, 5xx errors get
                                        # more dangerous...

        ##########################################################################
        # Hosts to pool
        ##########################################################################

        # Defaults ===============================================================
        # Set antispam to -1, since it is far safer to use that together with
        # no bouncemail
        defaults:
        timeout 300
        antispam -1
        batchlimit 100

        poll pop.remote.com protocol POP3 user "drbob@remote.com" there with password "secretpass" is "bob@box" here

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