Think about sending Millions of mails per day to your user base.. How you can handle such big volume of mails on a daily basis . Here i am going to explain about the infrastructure we have done to send Bulk mailing. Requirement from our Management: The requirement was to send around 5 Million mails per day . We [...]
We have recently found that our many ip address were listed in spam, we were having SPF records and Reverse dns entry for all the ips which we used to send out going mails. Now we have installed and configured DKIM Milter for multiple send mail servers. Now all our mails are coming in inbox and dkim [...]
The best way to check DNS records is to do nslookup in your command line and get the results, The other easy way is to go here  http://www.mxtoolbox.com/DNSLookup.aspx
CloudFlare launched publicly exactly one year ago today. In that year, we have grown from virtually no traffic to powering more than 15 billion page views and 350 million unique visitors in the last month. Today, to celebrate CloudFlare’s birthday, we thought we’d give our users a present in the form of a groundbreaking new [...]
Smtp.com provides you the facility to check your Reverse DNS Record.Just enter your IP and click on check. A standard forward DNS record is the association between a domain name with an IP address on the Internet. The corollary to this is reverse DNS, which associates a domain name with that of an IP address. Despite their [...]
It is very important to white list domain for sending mails, otherwise all your mail will go to the spam folder. The guide lines are available with all major email service providers like gamil,yahoo, hotmail etc. Here i am going to list a few important points by which you can avoid your mails to go to spam [...]
CloudFlare is a service by which you can protect and accelerate your website speed by 30% and its Free.  This will help small and medium site owners to speed up the page loading and score Google page speed. Lets see what is CloudFlare. The following is a picture which shows the website without CloudFlare and with CloudFlare [...]
PXE Installation Red Hat allows you to install the OS over the network using NFS, FTP or HTTP. If the hardware supports PXE (Pre-execution Environment) the NIC card will send out a broadcast request for DHCP information. The DHCP server provides the client with a IP address and other network infomation such as the TFTP [...]
This Sendmail error–also seen as “Transient parse error — message queued for future delivery” or “Name server:Â domain: host not found”–indicates that Sendmail encountered a problem with one of its DNS resource record lookups of the destination domain. Solution : Check your DNS server, Your sendmail server is not able to resolve names.
To Add an MX Record Go to the Zone File Editor for the domain name you want to update. Click Add New Record. The Add DNS Record Window displays. From the Record type list, select MX (Mail Exchanger). Complete the following fields: Priority — Select the priority you want to assign to the mail server. Host Name — Enter the domain [...]
AÂ load balancer distributes application loads between two or more EC2 instances. You can dynamically register or deregister EC2 instances from the load balancer as the capacity requirements of your application change with time.A load balancer is represented by a DNS name and a set of ports and provides the destination to which all requests intended [...]
Here we are going to explain about  the  procedure to Connecting to Amazon AWS from Windows to a Linux AMI via putty or winscp. There are two ways by which you can connect, First is putty, the ssh connection and  the second is  Winscp. The first one will enable you to get the terminal and the second will [...]
The Anti-Spam SMTP Proxy (ASSP) server project is an Open Source, Perl based, platform-independent transparent SMTP proxy server that leverages numerous methodologies and technologies to both rigidly and adaptively identify e-mail spam. ASSP is easy to set up because it requires only minor changes to the configuration of your your Mail Transfer Agent. Auto Update Control [...]
When comes to manage multiple internet connection sharing and Load balancing ,there are couple of open source products but here we are going to introduce one amazing open source product called Zeroshell. Zeroshell is a Linux distribution for servers and embedded devices aimed at providing the main network services a LAN requires. It is available in the [...]
traceroute [options] host [packetsize] TCP/IP command. Trace route taken by packets to reach network host. traceroute attempts tracing by launching UDP probe packets with a small TTL (time-to-live), then listening for an ICMP “time exceeded” reply from a gateway. host is the destination hostname or the IP number of the host to reach.packetsize is the packet size in bytes [...]