readme-english.md

Configure Postfix to send mail using an external SMTP server

Update and Install dependencies

apt-get update
apt-get install postfix mailutils libsasl2-modules

During the installation, a prompt will appear asking for your general type of mail configuration.
- Select Internet
- Type 'localhost'

Copy the files (main.cf, generic and sasl_passwd) to /etc/postfix

Modify the file /etc/postfix/main.cf and change the following lines

myhostname = debian   # CHANGE ME
relayhost = [smtp.domain.com]:587 # CHANGE ME

Modify the file /etc/postfix/sasl_passwd with your mail credentials

Example:
[smtp.domain.com]:587 user@domain.com:password

Modify the file /etc/postfix/generic with your generic mail rewrite

Example:
root@debian.local       user@domain.com

Create the hash db file for Postfix by running the postmap command

postmap /etc/postfix/sasl_passwd
postmap /etc/postfix/generic

Test mail send

echo "OK" | mail -s "Testing mail postfix external SMTP" user@domain.com