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Topic: Which version of services (postfix, dovecot...) are installed

==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
Does iredmail provide a file telling me about the versions of services it has installed?

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Re: Which version of services (postfix, dovecot...) are installed

In case there's not a file, I used a command based approach i.e for every service that I needed to know the version, I used the corresponding command:

1. postfix -> postconf -d | grep mail_version
2. dovecot -> dovecot --version
3. apache -> apache2 -v
4. spamassassin -> spamassassin -V
5. clamav -> clamscan -V
...

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Re: Which version of services (postfix, dovecot...) are installed

*) If you use RHEL/CentOS, run command "rpm -qa".
*) For Debian/Ubuntu, run "dpkg -l"
*) For FreeBSD, run "pkg info"
*) For OpenBSD, run "pkg_info"