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How to fix Amazon EC2 IP blacklisting in Spamhaus PBL and other email RBLs
Amazon claims to have a system to white-list all their IP addresses at Spamhaus regularly. But we still see Amazon EC2 users reporting mail issues due to IP blacklists by Spamhaus. IP blacklisting occur when your mail server gets compromised due to any malware or open...
AWS Port 25 block – Why does it happen and how to fix it?
From payment confirmation to support queries, emails play a vital role in online business communication. Delayed alerts or lost orders end up adversely affecting the business. In AWS EC2 instances, mail delivery problems can happen due to many reasons, mainly port 25...
How to fix Fatal error: Class ‘PDO’ not found in PHP apps like Drupal, Prestashop, Joomla, etc
Fatal error: Class 'PDO' not found is an error seen in websites running PHP applications such as Drupal, Prestashop, WordPress, etc. It'll look something like this: Fatal error: Class 'PDO' not found in /home/romrac/public_html/drupal/includes/database/database.inc on...
HTTP/2 is vulnerable to DoS attacks. Here’s how to fix them.
Everyone loves fast, secure websites. Google's SPDY and it's successor HTTP/2 was seen as a big step towards that goal. As of Aug 6th 2016, 9.1% of websites use HTTP/2, and the trend is seeing a steep rise. All looked good. On Aug 3rd, this smooth ride suffered a bit...
How support quality management builds customer loyalty?
Getting a new customer is multiple times harder than retaining one. But customers would stay only if they receive top quality support service. In web hosting support, slow responses and recurring issues often lead to customer attrition. That's why quality management...
Top 5 reasons why 24/7 expert server monitoring is important for security and uptime
People love fast websites, and so does Google. It's then no surprise that the top spots in Google search results are occupied by fast websites with high uptime. It's a popular belief that using a monitoring tool is a good hedge against preventing or recovering from a...
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