IT-Wissen/linux/linux-sendmail.md

Table of Contents

• Sendmail
• config
• custom "from: " address

Sendmail

apt install sendmail

config

• change first line of /etc/hosts to:
  127.0.0.1 localhost.localdomain localhost backup
  ("backup" is the hostname. Get it with: $ hostname
• config\ sudo sendmailconfig # answer "Y" to everything

custom "from: " address

in order to have a custom "from: " email address (instead of user@localhost.localdomain) do the following:

• create file /etc/mail/genericstable
• add following content:

  user       notifications@docuteam.ch
  root       notifications@docuteam.ch
  

• create genericstable.db
makemap hash /etc/mail/genericstable < /etc/mail/genericstable
• modify /etc/mail/sendmail.mc
  add following lines right before MAILER_DEFINITIONS:

  FEATURE(`genericstable')dnl`
  GENERICS_DOMAIN(`localhost.localdomain')dnl
  

• macro erstellen
  m4 sendmail.mc > sendmail.cf
• restart sendmail service
  systemctl restart sendmail.service
• test mail
  echo "Subject: sendmail test 1" | sendmail -v r.rutishauser@docuteam.ch