How to install Open Webmail 3.00 on Rocky Linux 10
===================================================
By Thomas Chung <tchung@openwebmail.org>
Last Update 2026.04.04

## Rocky Linux 10 Release Dates

2025.11.25 - Rocky Linux 10.1 GA released (Rocky Linux 10 will be supported until *May 2035*)
             https://rockylinux.org/news/rocky-linux-10-1-ga-release

2025.06.11 - Rocky Linux 10.0 GA released (Rocky Linux 10 will be supported until *May 2035*)
             https://rockylinux.org/news/rocky-linux-10-0-ga-release

## iPhone / Mobile Device Support

Open Webmail 3.00 includes built-in mobile UI support for iPhone, iPad, and Android devices.
When a mobile browser is detected, optimized responsive templates are automatically served
while the desktop UI remains unchanged.

Mobile-optimized views include:
- Login page (touch-friendly inputs and buttons)
- Inbox / folder view (responsive toolbar and message list)
- Read message view (HTML emails fit within viewport)
- Compose / reply view (properly sized fields and buttons)

No additional configuration is required. Mobile support works out of the box.


0) Disable selinux and reboot
# vi /etc/selinux/config
SELINUX=disabled
# reboot
...
# sestatus
SELinux status:                 disabled

1) Install and Configure postfix and httpd
## Install postfix if not installed
# dnf -y install postfix postfix-lmdb cyrus-sasl cyrus-sasl-plain
# systemctl enable postfix && systemctl start postfix

!!! WARNING !!!
There may be a restriction for outgoing mail (SMTP port 25) by your ISP/Cloud Provider.
Please check with them if you're not able to send mail due to their restriction.
You can check with a simple telnet test to confirm:
$ telnet remotehost 25
Trying {ip_address_of_remotehost}...

Also you need to check following parameter to accept incoming mail:
# postconf inet_interfaces
inet_interfaces = all

If you see localhost, set it to all and restart postfix:
# postconf -e inet_interfaces = all
# systemctl restart postfix

## Install httpd and mod_ssl if not installed
# dnf -y install httpd mod_ssl
# systemctl enable httpd && systemctl start httpd
** Note **
If this is the first time to start httpd, it may take up to 30 seconds. Be patient :)

## Update firewall to accept smtp (port 25), http (port 80), and https (port 443)
# firewall-cmd --permanent --zone=public --add-service=smtp --add-service=http --add-service=https
# firewall-cmd --reload
# firewall-cmd --list-services

2) Install Development Tools group if not installed
# dnf -y groupinstall "Development Tools"

## Enable epel repository for el10
# dnf config-manager --set-enabled crb
# dnf install epel-release

3) Configure openwebmail repository for el10
# dnf -y install dnf-utils
# dnf config-manager --add-repo https://openwebmail.org/repo/el10/openwebmail-el10.repo

4) Install openwebmail pkgs for el10
# dnf -y install openwebmail
(this will also install required perl dependency packages)

5) Run openwebmail-tool to initialize
# /usr/local/bin/openwebmail-tool --init --yes
(--init creates the initial files and directories needed for openwebmail)
(--yes will automatically send a site report to the developer)

6) Open a Browser and login to webmail URL with non-root user account
https://{hostname}/webmail

If you see the Open Webmail Login, you've installed successfully!