Drupal unable to send emails using the contact forms [a host issue]

Like many of us, I am also facing an issue with sending emails from Drupal website hosted on Linux Host. From my tests I found that -
1) I can send and receive emails by accessing webmail of the domain's email account.

2) But when sending email using the contact from on the website, Drupal says email is sent successfully but emails are not received. Nor are the emails visible in the "Sent" box in webmail. The same email was configured on the site as well as contact form settings.

The error thrown by Drupal is as shown above:

"Unable to send email. Contact the site administrator if the problem persists..

Incidentally, I also tested on a WordPress site and even emails are not getting sent from WordPress's Contact Form 7 plugin.

So I ruled out Drupal as the issue or WordPress for that matter. It seems to me that it could be the host that is not allowing the emails to be sent. So I contacted my service provider.

And, here is the reply from my hosting service provider:

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XAMPP Apache Service fails to start due to blocked port: Error: Apache Shutdown Unexpectedly -may be due to blocked port, missing dependencies, improper privileges, or shutdown by another method

Today, the Apache service installed with XAMPP shutdown on me. The following error was displayed on the XAMPP Control Panel -

"Error: Apache Shutdown Unexpectedly -may be due to blocked port, missing dependencies, improper privileges, a crash, or shutdown by another method".

Check the Apache error logs which shows -

[Fri Oct 03 07:41:34.188511 2014] [ssl:warn] [pid 404:tid 400] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Fri Oct 03 07:41:34.360389 2014] [ssl:warn] [pid 404:tid 400] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name

Let's see how to resolve this issue.

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Fix: How to solve Windows Explorer frequent crashes in Windows 10 ?

After upgrading to Windows 10, I observed that the Windows Explorer keeps crashing. The issue arises when we are doing some activities on the Windows Explorer and especially when switching Windows by pressing ALT+TAB. From Googling I found that several others are also facing this problem. For me. this was happening on the latest Windows 10 OS upgraded from Windows 7. If your Windows Explorer is also crashing abruptly, try the following solutions:

How to resolve Windows Explorer crashes in Windows 10?

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[Workaround] Unable to install Visual Studio in Windows 8.1: Access Denied

This post is a troubleshooting done on the issue of Visual Studio installation on Windows (Windows 8.1 in this case). Error Encountered: 0x80070005 - Access Denied

Visual Studio Express setup log shows:

"Error 0x80070005: Failed to write run key value.
Error 0x80070005: Failed to update resume mode.
Error 0x80070005: Failed to begin registration session.
Error 0x80070005: Failed to begin registration session in per-machine process.
Error 0x80070005: Failed to register bundle."

Workaround:

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[Solved]: Unable to uninstall Visual Studio Express 2012 from Windows computer

Issue: Unable to uninstall Visual Studio Express 2012 from Windows computer

Microsoft Visual Studio Express 2012 installation did not get installed due to Access Denied error. But Visual Studio Express 2012 is found in the list of Programs in Control Panel > Uninstall a Program. As it is not installed properly, the Visual Studio Program is cannot be run.

Attempts to uninstall the program but still getting "Access Denied error".

Visual Studio Express setup log shows:

"Error 0x80070005: Failed to write run key value.
Error 0x80070005: Failed to update resume mode.
Error 0x80070005: Failed to begin registration session.
Error 0x80070005: Failed to begin registration session in per-machine process.
Error 0x80070005: Failed to register bundle."

Solution:

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[Resolved] Samsung Galaxy J2 (Android) not connecting to Wi-Fi

Here is a Wi-Fi issue I recently encountered on Samsung Galaxy J2 smartphone.

1) The Samsung Galaxy J2 detected the Wi-Fi on turning the Wi-Fi on. But after entering the password it would show "connecting..." but won't connect.
2) Another issue is the Wi-Fi hotspot keeps turning off and on.

If you are also experiencing the same issue, you may try the following:

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