63 lines
1.6 KiB
Bash
63 lines
1.6 KiB
Bash
#!/bin/bash
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# source:
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# https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-22-04
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#
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set your_domain="abc.com"
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sudo apt update
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sudo apt install mailutils
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# sudo vim /etc/postfix/main.cf
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#
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# change, to receive emails only from the server on which it is running—that is, from localhost
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# inet_interfaces = loopback-only
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#
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# change, if domain is actually a subdomain and you want the email messages to look as if they were sent from the main domain:
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#
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# masquerade_domains = {your_main_domain}
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# restart service
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sudo systemctl restart postfix
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# to test smtp is working:
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# echo "This is the body of the email" | mail -s "This is the subject line" your_email_address
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# to add email forwarding:
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# sudo vim /etc/aliases
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#
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# postmaster: root
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# root: your_email_address
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#
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# for the change to take effect run:
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# sudo newaliases
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#
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# to test email forwarding:
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# echo "This is the body of the email" | mail -s "This is the subject line" root
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# Enable SMTP Encryption
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#
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# install certbot:
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sudo apt install certbot
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# make sure server port 80 is open underfirewall
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# if you are using on server firewall "ufw", do:
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# sudo ufw allow 80
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# get cert
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sudo certbot certonly --standalone --rsa-key-size 4096 --agree-tos --preferred-challenges http -d $your_domain
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# sudo vim /etc/postfix/main.cf
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#
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# smtpd_tls_cert_file=/etc/letsencrypt/live/your_domain/fullchain.pem
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# smtpd_tls_key_file=/etc/letsencrypt/live/your_domain/privkey.pem
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# restart service
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# sudo systemctl restart postfix
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# test
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# echo "This is the body of an encrypted email" | mail -s "This is the subject line" root
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