Self-Hosted Mail Stack (Postfix + Dovecot + Rspamd + Roundcube + Nginx)

This repo contains a Bash script that provisions a minimal mail server on a Debian/Ubuntu-like system:

• Postfix (SMTP, submission)
• Dovecot (IMAP, LMTP, virtual maildirs)
• Rspamd (spam, DKIM signing)
• MariaDB (for Roundcube)
• Roundcube (webmail)
• Nginx (TLS terminator for Roundcube)
• Let’s Encrypt paths pre-wired

It’s based on real, working manual steps, rewritten to be repeatable.

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1. What it does

1. sets the hostname to mail.YOURDOMAIN
2. installs all required packages
3. creates a vmail system user (uid/gid 5000)
4. configures Dovecot to use virtual Maildir under /var/mail/vmail/%d/%n
5. creates users admin@domain and info@domain in /etc/dovecot/passwd
6. configures Postfix for virtual mailboxes and LMTP to Dovecot
7. wires Postfix to Rspamd using milter
8. prepares Roundcube with MariaDB backend
9. creates Nginx vhost for https://mail.domain
10. creates maildirs and sets permissions

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2. Requirements

• Fresh Debian/Ubuntu server
• A real domain, e.g. example.com
• DNS A record: mail.example.com -> your_server_ip
• Let’s Encrypt certificate present (or you run certbot yourself)
• Port 80/443/25/587/993 open

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3. Usage

git clone https://github.com/AliEdd1/mail_server_roundcube.git
cd mail_server_roundcube.git
sudo bash mail.sh