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To edit files on the command line, you can use an editor such as vi. To open the file, run
Now you see the contents of the file (if there is any. Please note that the file is created if it does not exist yet.).
The most important commands in vi are these:
Press i to enter the Insert mode. Now you can type in your text.
To leave the Insert mode press ESC.
Some helpful links:
http://www.clamav.net) as virus scanner and the E-mail Sanitizer (http://www.impsec.org/email-tools/procmail-security.html) as content filter.ISPConfig uses ClamAV (
One of the users on the system has a CatchAll-email address. He receives all emails, even those for users of another site...
One of the users on the system has a CatchAll-email address. He receives all emails, even those intended for users of another site on the same server. The MTA on the server is postfix.
Please check if the domain of the users that receives all emails is the same as the domain $mydomain in /etc/postfix/main.cf. If this is the case, change $mydomain and run
on the shell.
You should never enter a domain that is used for a virtual site on the server as $mydomain in /etc/postfix/main.cf!
Please check if Sendmail/Postfix and your POP3 daemon are running by executing
You will get a list of all services listening on your server.
If they are running re-configure your firewall (iptables or ipchains) so that the ports 25 (Sendmail/Postfix) and 110 (POP3) are not blocked. If this does not help please check that Sendmail/Postfix is really running on port 25 and your POP3 daemon on port 110.
(Hint for standard RedHat installations: If you have webmin installed and are running Sendmail, go to Webmin->Servers->Sendmail->Sendmail Options. Under SMTP Port Options you often find the following entry:
Some useful links:
There are two solutions for this problem:
1) You configure
your MTA to allow authentication via SMTP (SMTP-Auth). Your users then
have to change settings in their email clients (e.g. Outlook), i.e.,
they have to activate Server requires authentication.
2) You install "POP-before-SMTP" or poprelayd on your server. Your users then have to fetch emails first before they are allowed to send emails for a restricted period of time (mostly 30 min.).
postconf -d | grep mail_version
to find out your Postfix version.
and change it:
disable_functions = exec
Don't forget to restart Apache afterwards.
The output will look like this:
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface MSS Window irtt 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 0 0 0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 0 0 0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 0 0 0
This means that the system with the IP address 192.168.0.100 is using 192.168.0.1 as gateway.