114 lines
2.4 KiB
Plaintext
114 lines
2.4 KiB
Plaintext
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First you have to install postfix to use the sendmail operator.
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On SuSe 42.2 it is installed by default. You can use Yast if this is not the case.
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Use "sudo apt install postfix" to install it on Ubuntu.
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During the installation, a prompt will appear asking for your General type of mail configuration.
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Select Internet Site. Then enter the fully qualified name of your domain,
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You have to make sure that the bash is your standard shell.
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On Ubuntu you have to change the standard from dash to bash.
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Use the command :
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sudo dpkg-reconfigure dash
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and then choose the "No" Option.
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Then you have to modify two files
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/etc/postfix/main.cf and /etc/postfix/sasl_passwd.
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If the latter one does not exist, you need to create it.
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In the sasl_passwd you have to edit (default port 25):
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[smtp.isp.example]:25 username:password
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Now create the hash db file for postfix by running:
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sudo postmap /etc/postfix/sasl_passwd
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In the main.cf you have to adapt the entries to your purposes (smtp Server without tls).
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Either you have to change existing entries or you have to create them.
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#specify SMTP relay host
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relayhost = [smtp.isp.example]:25
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# enable SASL authentication
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smtp_sasl_auth_enable = yes
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# disallow methods that allow anonymous authentication.
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smtp_sasl_security_options = noanonymous
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# where to find sasl_passwd
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smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
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# Enable STARTTLS encryption
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smtp_use_tls = no
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Example for a smtp server with tls:
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In the sasl_passwd you have to edit:
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[smtp.isp.example]:587 username:password
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In the main.cf you have to edit:
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# specify SMTP relay host
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relayhost = [smtp.isp.example]:587
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# enable SASL authentication
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smtp_sasl_auth_enable = yes
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# disallow methods that allow anonymous authentication.
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smtp_sasl_security_options = noanonymous
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# where to find sasl_passwd
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smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
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# Enable STARTTLS encryption
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smtp_use_tls = yes
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# where to find CA certificates
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smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
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Make sure for the sasl_passwd.db und the sasl_passwd that only root is able to read or write
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those files.
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You can do it with:
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sudo chown root:root /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db
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sudo chmod 0600 /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db
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As a last step you have to restart the postfix service:
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sudo service postfix restart
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