Plesk

I was not receiving mails from a particular email address. The MX records checked out fine. The mail server was not in any of the DNSBL list I was subscribed to. There was nothing in the logs that mentioned that there was any emails coming in from the user. However, it did have a lot of relaylocks for the mail servers IP address.

Digging in some more, I found a similar issue discussed at theplanet forum where the issue was caused due to conflict of timeouts and auth packets being dropped instead by the sender mail server, so I adjusted qmail timeout which seemed to push the conversation between the MTAs forward and the emails are now being accepted.

I changed the default timeout from 30 seconds to 15 seconds by editing the /etc/inetd and adding -t15 as below.

If you're short of IP addresses and hosting multiple domains on a single IP requiring SSL connection to all domains, then a good solution would be to get the Multi-Domain certificate from Comodo, which is a single certificate containing more than one domain name, and that certificate is for a single server installation.

However, the use of Host Headers (which is how you can use a single IP for more than one SSL enabled domain) is not recommended for E-Commerce sites.

The multi-domain certificate can only be purchased from one of the Comodo resellers, or can apply to become one yourself.

To order the certs, you will need to first generate a Certificate Signing Request Key. This is easily done via Plesk admin UI.

1. Login to the Plesk Control Panel.
   
2. From the left hand menu, select 'Server'.
   
3. Click on 'Certificates'.
   
4. Click on the 'Add New Certificate' item.
   
5. Fill out the information on the page. All items noted by red asterisks must be filled in
   
6. Press the 'Request' button.
   
7. You will then be returned to the Certificates menu. From the list at the bottom of the page, click on the certificate name that you just created. Mid-way down the page, there is a box. Copy the content of this box labelled 'CSR'.
   
8. Paste the CSR into the order screen when purchasing the SSL certificate.

Shortly after ordering, the SSL certificate is emailed to you zipped along with the below CA certs:

1. AddTrustExternalCARoot.crt
   
2. PositiveSSLCA.crt
   
3. UTNAddTrustServerCA.crt

The CA certs need to be concatenated and uploaded to Plesk as one single certificate and should follow the same order.

Those files are available for download from Comodo's support site as well.

The order you place the contents of those files into a new file is important, and should be followed as outlined above. No blank lines should be added between the certificate contents when you copy the contents of the existing CA certs into a new file. You then provide this new file to Plesk when it asks for the CA Certificate.

In order to install the certificate, go back to the Certificate area in Plesk and upload or copy/paste the certs into the relevant areas.

Return to the Server Page and go to the IP address section. Click on the relevant IP address and apply the newly installed certificate.

Package mpack is required in order to extract the backup contents.

The result is a set of tar and sql files that contain domains' directories and databases. Untar the directory as needed.

For example, to restore the httpdocs folder for the DOMAIN.TLD domain:

Reference:

How to extract web files, databases etc from Plesk backup manually?

1. Edit "/var/qmail/mailnames/{domain.tld}/.qmail-default"
   
2. Remove any lines in the file and add the pipe to file:
   
   | /var/www/vhosts/{domain.tld}/file.php

3. Change the file permission to be executable and owned by the correct user/group of the site, specially if you are executing under safe_mode.
   
   $ chmod 755 /var/www/vhosts/{domain.tld}/file.php

4. Check to make sure that "/var/qmail/control/rejectnonexist" does not have the corresponding domain listed there.
   
5. Restart qmail.

Create a "vhost.conf" file in "/var/www/vhosts/<DOMAIN.TLD>/conf/"

Rebuild the domain configs for the particular host via:

or rebuild all via: