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Author: iManila Support

Clearing DNS cache on different OS

Written on . Posted in Networking. Leave a Comment

This article describes how to clear the DNS cache on your computer.

Many computer operating systems (OS) use caching to store DNS lookup results. Normally this is not a problem, and accelerates network performance. However, when you are developing a web site or configuring domain settings, your computer’s DNS cache can get in the way, preventing you from accessing the correct site.

To clear the DNS cache, follow the appropriate procedure below

Windows 10

To clear your DNS cache if you use Windows 10, perform the following steps:

  1. Click Start.
  2. Typecmd this will search for the Command Prompt program
  3. Right-click Command Prompt and select Run as Administrator.
  4. Run the following command:

ipconfig /flushdns

  1. If the command succeeds, the system returns the following message:

Windows IP configuration successfully flushed the DNS Resolver Cache.

Windows® 8

To clear your DNS cache if you use Windows 8, perform the following steps:

  1. On your keyboard, press Win+X to open the WinX Menu.
  2. Right-click Command Prompt and select Run as Administrator.
  3. Run the following command:

ipconfig /flushdns

  1. If the command succeeds, the system returns the following message:

Windows IP configuration successfully flushed the DNS Resolver Cache.

Windows 7

To clear your DNS cache if you use Windows 7, perform the following steps:

  1. Click Start.
  2. Enter cmd in the Start menu search text box.
  3. Right-click Command Prompt and select Run as Administrator.
  4. Run the following command:

ipconfig /flushdns

  1. If the command succeeds, the system returns the following message:

Windows IP configuration successfully flushed the DNS Resolver Cache.


Windows XP, 2000, or Vista®

To clear your DNS cache if you use Windows XP, 2000, or Vista®, perform the following steps:

  1. Click Start.
  2. On the Start menu, click Run….
  • If you do not see the Run command in Vista, enter run in the Search bar.
  1. Run the following command in the Run text box:

ipconfig /flushdns

  1. If the command succeeds, the system returns the following message:

Successfully flushed the DNS Resolver Cache.

 

MacOS® 10.10

To clear your DNS cache if you use MacOS X version 10.10, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Click Terminal.
  4. Run the following command:

sudo discoveryutil mdnsflushcache

 

If the command succeeds, the system does not return any output.

Warning: To run this command, you must know the computer’s administrator account password.

MacOS 10.7, 10.8, and 10.9

To clear your DNS cache if you use MacOS X version 10.7, 10.8, or 10.9, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Double-click Terminal.
  4. Run the following command:

sudo killall -HUP mDNSResponder

 

If the command succeeds, the system does not return any output.

Warning: To run this command, you must know the computer’s administrator account password.

MacOS 10.5 and 10.6

To clear your DNS cache if you use MacOS X version 10.5 or 10.6, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Double-click Terminal.
  4. Run the following command:

sudo dscacheutil –flushcache

 

If the command succeeds, the system does not return any output.

Warning: To run this command, you must know the computer’s administrator account password.

Website Error Messages

Written on . Posted in Website.

When you receive an error “Internal server error 500” on your site, the best way to find the reason for it is to check the error log. iManila customers can do this from cPanel > Error log.

You will see a list of the last error messages generated by your website.  In this list you will find detailed information about each error including: the date and time of the error, some information about the client receiving the error, description of the error and information about which folder or file is generating the error.

Here are some examples of the most common ones and how to fix them:

 

In order to fix the issue, you should use your FTP client or the Filemanager within the cPanel and change the permissions of the file in question to 755.

 

 

The error is caused by incorrect permissions of the .htaccess file. However, such error message could be invoked if the permissions for the folder are not the correct ones either. Please ensure that both folder and .htaccess file within are set with 755 permissions.

Email Attachment Size Limit

Written on . Posted in Email. Leave a Comment

Email Attachment Size Limit

Technically, our Shared servers have a 50 MB limit on the size of outgoing e-mails (which includes the email body and attachments) sent via webmail but, in reality, there are a number of factors that determine how large of a file attachment you may successfully send. These factors include:

  • The fact that your attachment is MIME encoded, which causes the size to swell up to 40%.  So a 35 MB file on your hard drive will take up approx. 50 MB of space when MIME encoded for sending as an attachment. A 23 MB file on your hard drive will take up approx. 30 MB when MIME encoded.
  • Any limits your email client has on attachments, which may vary from email client to email client (for example, iManila Webmail’s limit is 50 MB, while Outlook 2010’s limit is 20 MB).
  • Any limits the recipient’s server has on email attachment size, which also vary from email service provider to email service provider (for example, Gmail, Yahoo! & Hotmail all have a 25 MB limit).
  • Any limits the recipient’s email client may have on attachment size.
  • The amount of free space available in the recipient’s e-mail account, if their mailbox has a size limit. (If their mailbox is full, your message will be rejected.)
  • How reliable your internal service provider (ISP) is at sending large files without corrupting them or aborting.

As you can see, there are many factors that can affect how large an attachment can be.  You may even encounter situations where you send an identical attachment to two people, and one receives it, and the other does not.  That is usually caused by one recipient’s server rejecting the attachment for being too large, and the other one accepting it.

If you need to share large files with your recipient, we recommend that you upload the file(s) to any other file sharing service first like Google Drive, OneDrive or Dropbox. Then, you can email your recipient the link (URL) where they can access/download the file(s). This allows you to share all sizes of files without clogging up inboxes or running into size limits.

Difference between POP and IMAP

Written on . Posted in Email. Leave a Comment

The information below explains the difference between the two most common incoming email protocols, POP and IMAP.

POP stands for Post Office Protocol, and was designed as a simple way to access a remote email server. POP works by downloading your emails from your provider’s mail server, and then marking them for deletion there. This means you can only ever read those email messages in that email client, on that computer. You will not be able to access any previously downloaded emails from any other device, or with any other email client, or through webmail.

Some email clients though like Microsoft Outlook, provides advance settings that would allow you to To enable (or disable) the “Leave a copy of the message on the server”. When this option is enabled, emails will remain on your mail server.

IMAP stands for Internet Message Access Protocol, and was designed specifically to eliminate the limitations of POP.

IMAP allows you to access your emails from any client, and any device, and webmail login at any time, until you delete them. You are always seeing the same emails, no matter how you access your provider’s server.

Since your email is stored on the provider’s server and not locally, you may run into email storage limits, when using IMAP.

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