73 lines
2.5 KiB
Markdown
73 lines
2.5 KiB
Markdown
# mail01
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This repo details the configuration for [setting up your own email server](https://www.aih.app/2023/07/03/set-up-your-own-email-server-on-ubuntu-22-04/) on Ubuntu 22.04.
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The above guide will take you through the steps required to set up your own email server. However, this repo contains sample configuration files to aid in the process. Remember to replace any instances of `moeny.ai` with your own domain name.
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Also, note that the `/etc/postfix/virtual_alias` file will need to include all user emails individually to prevent the catchall from sending those user's mail to the addresses it lists.
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See the below steps for setting up SMTP capabilities for your email server. These steps are not included in the linked guide, but they are included in the sample configuration files provided in this repo:
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1. Create a dedicated SMTP user:
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```bash
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# Create user (no login shell needed)
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sudo useradd -r -m -s /sbin/nologin smtp_user
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# Set password for SMTP authentication
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sudo passwd smtp_user
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# Create mail directory for the user
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sudo mkdir -p /home/smtp_user/Maildir/{cur,new,tmp}
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sudo chown -R smtp_user:smtp_user /home/smtp_user/Maildir
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sudo chmod -R 700 /home/smtp_user/Maildir
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```
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2. Make sure to add this user to `/etc/dovecot/dovecot-users` like below:
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```bash
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smtp_user@moeny.ai:{plain}smtp_user-password
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```
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3. Edit `/etc/postfix/main.cf` by setting the following lines to `encrypt` instead of `may`:
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```bash
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smtp_tls_security_level = encrypt
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smtpd_tls_security_level = encrypt
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```
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4. Edit `/etc/postfix/master.cf` by uncommenting the following lines:
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```bash
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# For STARTTLS secure SMTP submission on port 587
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submission inet n - y - - smtpd
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-o syslog_name=postfix/submission
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-o smtpd_tls_security_level=encrypt
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-o smtpd_sasl_auth_enable=yes
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-o smtpd_tls_auth_only=yes
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-o smtpd_relay_restrictions=permit_sasl_authenticated,reject
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# For SMTPS implicit SSL/TLS on port 465
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smtps inet n - y - - smtpd
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-o syslog_name=postfix/smtps
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-o smtpd_tls_wrappermode=yes
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-o smtpd_sasl_auth_enable=yes
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-o smtpd_relay_restrictions=permit_sasl_authenticated,reject
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```
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5. Restart Postfix and Dovecot
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```bash
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sudo systemctl restart postfix
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sudo systemctl restart dovecot
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```
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6. Configure the end service you want to use with SMTP:
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```bash
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SMTP_HOST=mail01.moeny.ai
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SMTP_PORT=587
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SMTP_USERNAME=smtp_user@moeny.ai
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SMTP_EMAIL=service@moeny.ai
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SMTP_PASSWORD=smtp_user-password
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```
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7. Test the configuration by sending an email from the end service. |