Category: General

General discussion forum

SMTP reply codes

See rfc2821 for the basic specification of SMTP; see also rfc1123 for important additional information. See rfc1893 and rfc2034 for information about enhanced status codes. Check the RFC index for further mail-related RFCs. Reply codes in numerical order Code Meaning…

Apache Prefork versus Worker

Prefork: The prefork MPM uses multiple child processes with one thread each. Each process handles one connection at a time. On many systems, prefork is comparable in speed to worker, but uses more memory. Prefork’s threadless design has advantages over…

Popular Sites run on which Platforms?

Site Up Since Server Platform Programming Language Google.com November 1998 Linux C, Java, C++, PHP & MySQL Facebook.com February 2004 Linux PHP, MySQL and C++ YouTube.com February 2005 Linux C, Java and MySQL Yahoo.com August 1995 Linux C++, C, Java,…

Add Trailing Slash to URL (.htaccess)

Some of search engines remove the trailing slash from URLs that look like directories – e.g. Yahoo does it while listing on their search engine. This could result into duplicated content problems when the same page content is accessible under…

E-Mail Testing

Following are the few sites from where we can test our mailserver and domain for testing, reputation and blacklsiting.  Blacklist Checking https://www.blacklistmaster.com/check?t=<ip address> DKIM Testing http://dkimcore.org/c/keycheck IP/Domain Reputation and Scores http://www.senderbase.org/lookup/?search_string=<ip address or domain> https://www.senderscore.org/lookup.php?lookup=<ip address>&validLookup=true http://mxtoolbox.com/ Scan Website for…