Mail Systems

exim

• configuring first install of exim in Debian/Ubuntu

dpkg-reconfigure exim4-config

• General type of mail configuration: internet site; mail is sent and received directly using SMTP
• System mail name: <the FQDN of the host>
• IP-addresses to listen on for incoming SMTP connections: 127.0.0.1
• Other destinations for which mail is accepted: <blank>
• Domains to relay mail for: <blank>
• Machines to relay mail for: <blank>
• Keep number of DNS-queries minimal (Dial-on-Demand)? No
• Delivery method for local mail: mbox format in /var/mail/
• Split configuration into small files? No

commands

• see the queue:

mailq

• • or

exim -bp

the output shows the message queue giving useful information to work with it:

 root:~# mailq
 24h   379 1QC8cA-0001iy-B3 <ciaotest@server.company
           hellobye@server.company.nl
*; 1QC8cA-0001iy-B3: message ID (corresponds to a filename)
*; 24h : time msg spent in the queue
*; 379:  the size in bytes.

• find a queued message:

find /var/spool/ -name "1QC8cA-0001iy-B3*"

• to un-queue messages, I delete the files found by the find command (to rude maybe?)... it works

• flush the queue:

runq

• or

exim -q

• • flush queue forcing frozen messages to be sent

exim -qf 

• • flush queue forcing frozen/non-frozen messages to be sent

exim -qff

postfix

• enabling SMTP relay:

Restriction list name 	Status 	Effect of REJECT or DEFER result
smtpd_client_restrictions 	Optional 	Reject all client commands
smtpd_helo_restrictions 	Optional 	Reject HELO/EHLO information
smtpd_sender_restrictions 	Optional 	Reject MAIL FROM information
smtpd_recipient_restrictions 	Required 	Reject RCPT TO information
smtpd_data_restrictions 	Optional 	Reject DATA command
smtpd_end_of_data_restrictions 	Optional 	Reject END-OF-DATA command
smtpd_etrn_restrictions 	Optional 	Reject ETRN command

mailman

• show all lists

/var/lib/mailman/bin/list_lists

• show pending messages

/var/lib/mailman/bin/show_qfiles /var/lib/mailman/qfiles/shunt/*.pck

• re-queque shunted messages

/var/lib/mailman/bin/unshunt
# on another terminal
tail -f /var/log/mail.log

• find the parent list of an address:

 for lista in `/usr/lib/mailman/bin/list_lists -b`; do  /usr/lib/mailman/bin/list_members $lista|grep <indirizzo> && echo $lista; done

virtual hosts

• in the file:

/etc/mailman/mm_cfg.py