To disable reverse lookups in qmail with Plesk,  you can  add -Rt0 to the server_args line in /etc/xinetd.d/smtp_psa


service smtp
{
socket_type = stream
protocol = tcp
wait = no
disable = no
user = root
instances = UNLIMITED
server = /var/qmail/bin/tcp-env
server_args = -Rt0 /usr/sbin/rblsmtpd -r sbl-xbl.spamhaus.org /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true
}


Once you have made the change, you will need to restart the Xinetd service;

# /etc/init.d/xinetd restart

*DNS reverse lookups will no longer be called. Please note if you make any changes in Plesk regarding mail it will overwrite the change that you just made.*

Plesk for Linux, by default only allows one ftp users (While it does let you add multiple web users, they are locked to the same directory as the main ftp user). However you can get around this limitation by creating additional FTP users by creating them outside of Plesk, using SSH / Shell. The process is fairly simple as well and you can setup any directory structure that you want the new user to connect to, even for adding ftp access behind the root of a web directory if you like.

To do this, we simply need to do the following;

*Prior to doing this, make sure you already have an existing ftp user in place, as you will need their ID#

1. Log into your Linux server (Only applies to a dedicated server, colo server or virtual server - VPS).

2. Once you have logged in, you need to find an ID of an existing FTP user. To do this, simply type the following:

$id user     (user is the name of the existing ftp user)

3. If you have the user, you will be given an output that looks like this;

# uid=10002(user) gid=2524(psacln) groups=2524(psacln)

4. Take the uid number as you will need this to setup the new user.

5. Now, create the new user by using this command. Also with this command, you can set the directory you want them to have access to.;

/usr/sbin/useradd -u 10002 -o -d /var/www/vhosts/example.com/custom_folder -g psacln -s /bin/false newuser    (newuser is the name if the new account)

6. The new user has been created. Now you have to assign a password to it. To do this, type the following *make sure the password is not the same as the main Plesk ftp account*;

$passwd newuser password (Change password to the password you want to assign to the user)

7. It will then ask for you to confirm the password, type the password again. If done correctly, you will get the following message;

passwd: all authentication tokens updated successfully.

That’s it, the ftp user has been created. If you ever want to remove the user, you have to do it via command line as Plesk will not sure the user. To do this, simply type the following;

$/usr/sbin/userdel username

1. SSH to the server that has VsFTP, and SU to it.
2. Edit file /etc/vsftpd/vsftpd.conf, find line
anonymous_enable=YES
change to
anonymous_enable=NO
3. Do /sbin/service vsftpd restart
4. Try to ftp to domain or IP without providing a user/password. Access will be rejected.

Anonymous FTP has been rejected!

*Please note that Plesk only supports the use of Domainkeys as of 8.6 and up*.

To switch on spam protection based on DomainKeys:

1. Click the Server shortcut in the navigation pane.
2. Click the Mail icon in the Services group.
3. Under the DomainKeys spam protection group, select the following options:
   • Allow signing outgoing mail. Selecting this option allows you and your customers to switch on support for DomainKeys e-mail signing on a per-domain basis through the domain administration screens of the control panel (Domains > domain name > Mail > Preferences > Use DomainKeys spam protection system to sign outgoing e-mail messages option). It does not automatically switch on signing of outgoing e-mail messages.
   • Verify incoming mail. Selecting this option will configure the DomainKeys system to check all e-mail messages coming to e-mail users under all domains hosted on the server.
4. Click OK.

Now your mail server will check all incoming e-mail messages to ensure that they come from the claimed senders. All messages, sent from the domains that use DomainKeys to sign e-mail, which fail verification will be discarded. All messages, sent from the domains that do not participate in the DomainKeys program and do not sign e-mail, will be accepted without verifying.

To switch on signing outgoing e-mail messages for a single domain:

1. Go to Domains > domain name > Mail > Preferences.
2. Select the Use DomainKeys spam protection system to sign outgoing e-mail messages check box.
3. Click OK.

To switch on signing outgoing e-mail messages for a number of domains at once:

1. Click Domains.
2. Select the check boxes to the left of the domain names you need. To select all domains in the list, select the upper left check box in the column heading.
3. Click Group Operations.
4. Under Preferences, select the Switch on option next to the Use DomainKeys spam protection system to sign outgoing e-mail messages field.
5. Click OK.

Now, the following will happen for the selected domains:

• Private keys are generated and placed in the server’s database.
• Public keys are generated and placed in the TXT resource records created in the domains’ DNS zones.
• The sender’s policy advertised in the DNS TXT resource records is set to “all e-mail messages sent from this domain must be cryptographically signed; if someone receives an e-mail message claiming to originate from this domain, which is not signed, then this e-mail must be discarded.”
• Outgoing e-mail messages are digitally signed: the “DomainKeys-Signature” header containing a signature based on a private key is added to the message headers.

1. To install ImageMagick you will need to log in to your server or webspace with SSH.
From the command line first download and unzip the source:
wget ftp://ftp.imagemagick.org/pub/ImageMagick/ImageMagick.tar.gz

2. Next type, tar -xzvf ImageMagick.tar.gz

3. Next type, cd ImageMagick-6.2.6

4. The following commands will install ImageMagick into your home directory.
–without-Perl and –without-ttf will disable Perl and TrueType support; without
these switches the install will fail. /path/to/your/htdocs/im should be replaced
with the actual path to your home directory, and the last part, IM, can be changed
to anything. The command “pwd” will tell you the present working directory.

./configure –prefix=/path/to/your/htdocs/im –without-perl –without-ttf

5. Next type, make

6. Next type, make install

When these steps are completed ImageMagick will be installed in your home directory.
Please note that since this is a non-standard location, you may have to modify the configuration of other programs that use it so that they can find it. Any executables will also not be on the default executable search path.