Je mettrai ici quelques astuces que j'utilise pour envoyer des courriels avec la commande sendmail.
La commande sendmail est très utile lorsque l'on souhaite envoyer des e-mails dans des scripts bash.
J'utilise personnelement mon propre serveur de mail mais pour cet exercice je vais montrer comment configurer Exim en mode smarthost associé à un compte gmail.
dc_eximconfig_configtype='smarthost' dc_other_hostnames='' dc_local_interfaces='127.0.0.1 ; ::1' dc_readhost='' dc_relay_domains='' dc_minimaldns='false' dc_relay_nets='' dc_smarthost='smtp.gmail.com:587' CFILEMODE='644' dc_use_split_config='true' dc_hide_mailname='false' dc_mailname_in_oh='true' dc_localdelivery='mail_spool'
*:std_2021@gmail.com:myGMAILpassword123
Maintenant que notre serveur Exim est correctement configuré en mode smarthost nous pouvons utiliser la commande sendmail.
To: user@shebangthedolphins.net From: std_2021@gmail.com Subject: test mail Hello human world! This message has been sent with sendmail!
user@host:~$ cat /tmp/mail.header | sendmail -f std_2021@gmail.com user@shebangthedolphins.net
user01@shebangthedolphins.net user02@shebangthedolphins.net user03@shebangthedolphins.net
To: temp@address
From: std_2021@gmail.com
Date: Thu, 17 Jun 2021 08:45:25 +0200
Subject: test mail
Hi, this message has been sent with sendmail!
user@host:~$ for i in $(cat /tmp/mail.list | sort -R | head -n 1); do sleep 20; cp /tmp/mail.header.origin /tmp/mail.header; echo "sending mail to $i"; sed -i "s/temp@address/$i/" /tmp/mail.header; sed -i "s/Date:.*/Date: $(date -R)/" mail.header; cat /tmp/mail.header /tmp/body | /usr/sbin/sendmail -f std_2021@gmail.com "$i"; done
for i in $(cat /tmp/mail.list | sort -R | head -n 1); do sleep 20s #wait 20 second beetween each mail cp /tmp/mail.header.origin /tmp/mail.header #copy template header to current header echo "sending mail to $i" #echo current recipient sed -i "s/temp@address/$i/" /tmp/mail.header #replace temp@shebangthedolphins.net by current recipient mail address in /tmp/mail.header sed -i "s/Date:.*/Date: $(date -R)/" /tmp/mail.header #replace Date field by current date in /tmp/mail.header cat /tmp/mail.header /tmp/body | /usr/sbin/sendmail -f std_2021@gmail.com "$i" #send email to current recipient done
Si nécessaire on peut ajouter d'autres en-têtes :
Content-type: text/plain; charset=utf-8
Mime-Version: 1.0
X-Priority: 1 (Highest)
Disposition-Notification-To: <sender@shebangthedolphins.net>
user@host:~$ base64 secret.svg PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI5MDAiIGhlaWdo dD0iNjAwIj48cGF0aCBmaWxsPSIjRUQyOTM5IiBkPSJNMCAwaDkwMHY2MDBIMHoiLz48cGF0aCBm aWxsPSIjZmZmIiBkPSJNMCAwaDYwMHY2MDBIMHoiLz48cGF0aCBmaWxsPSIjMDAyMzk1IiBkPSJN MCAwaDMwMHY2MDBIMHoiLz48L3N2Zz4=
--19032019ABCDE Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi, this message has been sent with sendmail! --19032019ABCDE Content-Type: application/svg; name="secret.svg" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="secret.svg" PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI5MDAiIGhlaWdo dD0iNjAwIj48cGF0aCBmaWxsPSIjRUQyOTM5IiBkPSJNMCAwaDkwMHY2MDBIMHoiLz48cGF0aCBm aWxsPSIjZmZmIiBkPSJNMCAwaDYwMHY2MDBIMHoiLz48cGF0aCBmaWxsPSIjMDAyMzk1IiBkPSJN MCAwaDMwMHY2MDBIMHoiLz48L3N2Zz4= --19032019ABCDE
To: user@shebangthedolphins.net
From: std_2021@gmail.com
Date: Thu, 17 Jun 2021 08:45:25 +0200
Subject: test mail
Content-type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="19032019ABCDE"
user@host:~$ cat /tmp/mail /tmp/mail | sendmail -f std_2021@gmail.com user@shebangthedolphins.net
Contact :