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2 causes for “550 REJECTED – Bad HELO – Host impersonating [DOMAIN]” & how to fix it

Mail errors. They hit you at your most vulnerable, and make you want to smash your laptop.

We know. Because we help website owners resolve email errors and other technical issues as part of our Outsourced Hosting Support services for web hosting providers.

Hosting users frustrated with cryptic email errors would submit a support request, and we’ll fix it for them in a few minutes.

Here’s an email bounce error we fixed recently in a Linux cPanel/WHM server: (more…)

How to fix “554 Too many recipients” email error

Here at, we provide Outsourced Tech Support to web hosting providers. As part of our service, we resolve email errors posted by hosting users.

A common email bounce error we see in VPS and Shared servers is:

The rejected e-mail address was ''. Subject 'My mail subject', Server Error: 554, Server Response: 554 Too many recipients, Server: '', Windows Live Mail Error ID: 0x800CCC79, Protocol: SMTP, Port: 587, Secure(SSL): No

This error is seen when people attempt to send group mails with a large CC or BCC list. (more…)

Docker container memory overhead – How to prevent OOM errors

Many developers now use Docker to host their apps in production servers.

But Docker in production servers often cause resource bottlenecks – especially Docker container memory overhead.

Here at, we help web developers and digital marketers to setup and maintain Docker based web hosting servers.

And a common issue we resolve is containers crashing due to “Out of memory” errors as a result of traffic spikes, spam attacks, etc. (more…)

Apache PCI Compliance : How to avoid Payment Gateway penalties

Payment gateways such as Stripe and handle billions of dollars worth of business per month.

That is why payment gateways and shopping carts are juicy targets for hackers to steal Credit Card info, User identity, etc.

As a defense, Payment Gateways require all eCommerce sites to be fully secure against common attacks, which is ensured through PCI DSS security standard.

Sites that are not PCI DSS compliant can face penalties or even lifetime bans if there is a data breach. (more…)

How to fix “550 email blocked” email error

Here at, our Hosting Support Engineers maintain and support servers of web hosts, digital marketers and other online businesses.

550 Email blocked is an email bounce error that we usually see in Shared servers, VPS servers and Cloud Instances.

Here’s a typical bounce message: (more…)

How to fix Mutagen Astronomy vulnerability (CVE-2018-14634 bug) in RedHat, CentOS, Debian & Ubuntu servers

On Sep 25th, security researcher Qualys disclosed a new Linux Kernel vulnerability dubbed Mutagen Astronomy (CVE-2018-14634) that allows attackers to gain administrator (root) privileges in unpatched Linux servers.

Here at, we maintain servers of web hosts and other online businesses as part of our Server Management Services. In this service we detect emerging threats and proactively patch the servers to prevent security exploits. (more…)

7 reasons for Laravel “something went wrong” error, and how to fix them

During a new App setup, app migration or update, Laravel might show the error : “Whoops, looks like something went wrong.

Errors can be frustrating, but what makes it even more frustrating is when it is cryptic like this:

Laravel something went wrong (more…)

What is the cost of Web Hosting Tech Support?

Web hosting is a ruthless business. To survive and succeed as a web host, you’ll need to provide super fast services, high service uptime and 24/7 friendly support.

But it’s easier said than done. You’ll need to maintain your servers like a fine racing car, and be available 24/7 for your customers.

For that, you either end up spending all your time at office, or you pay through your nose to hire experienced web hosting technicians. (more…)