Re: accidently deleted /var/www/iradadmin

First of all, you can always install iRedAdmin manually by following its installation guides:
http://www.iredmail.org/doc.html

Second, if you still have iRedMail install directory you used to deploy iRedMail on this server:

1. Find the iRedMail installation directory, e.g. /root/iRedMail-0.8.3/
2. Open file /root/iRedMail-0.8.3/.status
3. Remove below line:

export status_iredadmin_config="DONE"

4. Re-execute iRedMail.sh:

# bash iRedMail.sh

Answer Yes while it asks whether to use existing config file. Then it will install only iRedAdmin (open source edition) for you.