Fix Outlook Error “Your Mailbox Has Reached Its Maximum Size Limit”

Microsoft Outlook emails are stored in a single database file with an extension of .ost or .pst. Various Outlook versions have different .ost/.pst storage limits. When the .pst or .ost file reaches it's storage limit you will get an error "Your mailbox has reached its maximum size limit at which you cannot send or receive any more content. Empty your deleted items folder from Outlook or delete messages from your mailbox to create more space." This can be fixed...read on.

What is an .OST or .PST file?

Outlook Data Files (.ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode. This type of data file is also used for accounts that you set up with the Outlook Connector for Outlook.com (formerly Hotmail). Outlook Data Files (.ost) are always copies of items that are saved on a mail server and don’t need to be backed up like Outlook Data Files (.pst).

Outlook Data File (.pst)

An Outlook Data File (.pst) contains your messages and other Outlook items and is saved on your computer. When you use POP accounts, all of your email messages from your mail server and save them on your computer.

Note: In Outlook 2013 and earlier versions, IMAP accounts also used an Outlook Data File (.pst). In Outlook 2016 and Outlook for Microsoft 365, IMAP accounts use Offline Outlook Data Files (.ost).

Offline Outlook Data File (.ost)

Most other account types, such as IMAP accounts, Microsoft 365 accounts, Exchange accounts, and Outlook.com accounts use an Offline Outlook Data File (.ost) file to store a synchronized copy of your mailbox information on your local computer.

.OST & .PST Limits

The various Microsoft Outlook versions come with specific data storage limits. Outlook 2010, 2013, and 2016 have maximum limits of 50GB. Whereas, Outlook 2003 and 2007 have a maximum data storage limit of 20GB.

How To Fix Outlook Error "Your mailbox has reached its maximum size limit at which you cannot send or receive any more content. Empty your deleted items folder from Outlook or delete messages from your mailbox to create more space."

You have two options:

1)delete or archive email messages or

2)increase the size limit of the .ost/.pst file.
Option 1 is self explanatory, but what if you prefer option 2?

Adjust the .OST or .PST file size limit in Windows Registry

For this option we will have to create Windows registry entries.
Note: If you have never edited the registry then this option is NOT for you. If you feel brave and what to go ahead then make a BACKUP or your registry first.

Before you start, make sure Outlook is closed.

Note: Check your version of Outlook and match it to the option below.

Click Start, click Run, type Regedit, and then click OK.

In the left pane, expand the following registry key:

For Outlook 2016

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook

For Outlook 2013

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Outlook

For Outlook 2010

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\14.0\Outlook

For Outlook 2007

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook

For Outlook 2003

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\11.0\Outlook

Right click Outlook, point to New, and then click Key.
Regedit - Outlook - New Key

Type PST, and then press ENTER. (The screen shot for this step is listed below).
Regedit - PST

Right click PST, point to New, and then click DWORD value. (The screen shot for this step is listed below).
Regedit - New DWORD Value

Type MaxFileSize, and then press ENTER twice. (The screen shot for this step is listed below).
Regedit - MaxFileSize

In the Edit DWORD Value window, choose Decimal and type the value in the Value data box, and then click OK.
Note 1GB=1*1024*1024*1024byte; 1MB=1*1024*1024byte; 1KB=1*1024byte, the example below is for a 100GB size limit with a 95GB warning limit.


Edit DWORD Value window

Repeat above steps to create another DWORD MaxLargeFileSize.

Repeat steps above to create another DWORD WarnLargeFileSize, and then close the registry.

You can now open Microsoft Outlook.

 

 

Extend WiFi To An Outdoor Office Or Shed

Getting internet to an outdoor building isn't always as straight forward as it should be. WiFi is a low output power and high frequency medium that does not penetrate well or reach far. In order to make WiFi effective it must be in close proximity.

Network cable isn't always a solution either as ethernet cable length is limited to max 100 meters. So how are you supposed to get internet to an outdoor shed /office?

How To Extend WiFi/Internet to a shed or outdoor building

If the outdoor building is within 100 meters then the best solution is to lay an ethernet cable, this gives the best performance and zero latency. But, sometimes this isn't possible or cost effective. Lets look at the wifi alternative.

To extend internet to an outdoor shed the most obvious solution is to make use of an outdoor point to point WiFi link. This involves installing ethernet cabling from the main house router to the roof where a point to point WiFi bridge unit is installed.

On the outdoor building/office/shed the same has to happen, an outdoor WiFi bridge unit is installed on the roof with ethernet cable leading down in to the shed. At the end of the ethernet cable a single device can be connected or if needed a WiFi access point can be installed that will provide WiFi coverage to that area.

It is important to note that this type of connection requires line of sight and can work up to 5km.

Get in touch with a WiFi specialist for more information.

 

 

 

 

DKIM Validation – “Fail, message has been altered”

What is DKIM?

DKIM - or DomainKeys Identified Mail is an email authentication method. DKIM adds a digital signature to every outgoing message. This signature is examined by receiving mail servers to determine if the message was really sent from the sending domain.

Do I need DKIM?

DKIM help protect your domain from spoofing. DKIM also help to prevent your mail from being tagged as spam. DKIM is a MUST!

Implementing DKIM

It's always best to consult your email hosting company for documentation on how to implement DKIM properly.

DKIM is implemented by adding a TXT record to the domain's DNS zone file. Typically a DKIM entry consists of a "Host" entry and "TXT value"

DKIM Validation

It is very important to test DKIM once implemented. I use DKIM Validator

You can validate your DKIM by sending a test message to the randomly generated email address created on the DKIM validator website.

Once the test email has been sent, go to the DKIM validator website and click the "View Results" button.

Inspecting the "DKIM Information" section will show details about the encryption, public key, headers, public key DNS lookup and validation.

The important part to confirm if validation succeed is under the "Validating Signature" heading.

A successful entry should have " Result = Pass"

An unsuccessful entry could have "Result = Fail" "Details: Message has been altered"

DKIM Validation Fail - Message has been altered

If you get this error you can try the following:

  • Verify the DKIM entry is set up properly - check documentation for your specific host
  • Do a test from webmail, if validation succeeds then in points to the message being changed from email client in transit to the server
  • Get in touch with your hosting company technical support to verify DKIM has been implemented correctly
  • Check email server settings
  • Try a different email client - as weird as it seems I had this issue using Windows Mail, when I swapped over to Microsoft Outlook validation succeeded.

Windows Mail causing DKIM validation fail Message has been altered

A client approached me indicating that they have mail deliverability issues. Messages were not sent as DKIM has not been working. Upon sending a test to DKIM Validator I got "Result = Fail" "Details: Message has been altered"

The client was using Windows Mail for a mail application.

Even after checking, removing and re adding the DKIM record it made no difference. The hosting company tech support was not helpful as per them everything was set up and working the way it should on there end.

I tried setting up a new mail account on a different computer with Windows Mail but had the same issue "Result = Fail" "Details: Message has been altered". Sending test emails from webmail worked fine.

You guessed it, Windows Mail was the culprit, I installed Microsoft Outlook, added the account and Bingo, Validation result = PASS.

 

 

 

 

 

 

Brother printer keep disconnecting from wifi

I recently had a client call up saying their Brother printer keeps disconnecting from wifi. The client seemed to think it happens at random intervals and restarting the printer fixes the problem for a short period.

For starters I know that this printer uses 2.4GHz for wifi connection, and if the Brother printer continually disconnects it could be due to channel interference.

The first thing I checked was the wifi signal strength, 2.4GHz channel utilisation and latency to the Brother printer and other wifi devices on the 2.4GHz network.

I found that the channel wasn't being utilised by neighboring wifi access points but I did found that the latency to the Brother printer was erroneous and high. Usually this indicate channel interference so I decided to change the wifi channel in any case.

Unfortunately the wifi channel change did not make a difference to the erroneous pings to the Brother printer.

I then proceeded to update the Brother printer firmware, which again did not make a difference to the erroneous pings.

Either the erroneous latency to the Brother printer whilst connected to wifi is normal or  there is a component failure on the Brother printer, mind you another option is that the cpu on the printer is running at or close to its max.

Scouring through the internet it seems it was not unusual for users with Brother printers to have constant wifi disconnect issues.

How to fix Brother printer wont stay connected to wifi issues

The fix is rather unusual and seems to resolve the issue with Brother printers constantly disconnecting from wifi.

On the back of your Brother printer is a label with a password to access the web interface. Make note of this password and connect to the web interface via the IP address.

An easy way to find your printer IP address is to have a look at the settings > network > wifi > IP section

Once you have logged in to the Brother web interface, head over to Network > Wireless > IPv6 and check the enabled option.

The Brother printer should restart and hopefully stay connected to wifi.

 

 

 

Intel NUC Does Not Power On

 

Intel NUC is a small form factor computer with a tiny footprint. Short for Next Unit of Computing, Intel NUC puts full-sized PC power in the palm of your hand. These units are my go to for business use as they screw right on to the back of any monitor with VESA mount holes.

The Intel NUC computers are very reliable but on occasion you might run in to an issue where you might need troubleshooting tips, here are some:

Intel NUC Powers On Then Off Again

This particular problem I have encountered quite recently where the Intel NUC was working fine for almost a year and then suddenly developed the issue where if you turn it on, the fan would spin at full speed and then about 8 seconds later the Intel NUC powers off again.

I tested the power supply, swapped out memory and SSD drive but the issue persisted.

In the end I send the unit back to the manufacturer for replacement.

Intel NUC Troubleshooting Tips

The first thing I look at is the power source, is the adapter and cable still in good condition or is there break points in the cable? I'll use a multimeter to check the voltage, on newer NUC's the adapter output voltage should be 19Volts.

Second, look for any POST error indicators, plug a speaker into the headphone jack to hear audible error beeps.

Blink Codes and Beep Codes for Intel NUC:

1 blink every 5 seconds. Power-on circuit may have failed. Contact Intel Customer Support for assistance.

3 blinks (3 beeps), On-off (1.0 second each) three times, then 2.5-second pause (off). The pattern repeats until the computer is powered off.
Things to try:
Remove and reseat the memory.
Make sure the contacts on the memory and the socket are clean.
Check for a faulty memory module by trying the memory in a known good system.
If the Intel NUC has two memory slots:

Try using just one memory module at a time, swapping it between the upper and lower memory slots.
Try using memory modules from the same manufacturer with the same part number and speed.
It's rare that this blink pattern would appear on an Intel NUC that has the memory modules soldered down on the board. If it does, it likely means the soldered down memory has failed. In this case, contact Intel Customer support.

16 on/off blinks (8 beeps). 0.25 seconds on, 0.25 seconds off, 0.25 seconds on, 0.25 seconds off, for a total of 16 blinks. Then the computer shuts down.
Cpu thermal issue. Check that chassis ventilation holes are not blocked and unit has sufficient airflow.

Also, try the Intel NUC No Boot Troubleshooting Wizard

In some cases the above steps might not help and could be caused by a faulty component on the motherboard. If you have swapped out memory modules/s and HDD/SDD drives and the issue persists it could be related to motherboard failure. In this case it would be best to get in touch with Intel support.

 

 

 

 

Intel NUC Over-Temperature Condition

I had a client call me up saying their near new Intel i5 10th Gen Nuc was occasionally coming up with "WARNING: System has recovered from an over-temperature condition" for no apparent reason. The system was not being stressed in any way.

First thing I did was to load Cpuid HWmonitor, it's an excellent tool to check the various temperature sensors throughout the system.  Running a 4k Youtube video quickly pushes the temperature to reach close to 100 degrees.

Upon inspection, the fan and heatsink were free of dust or other obstructions.  I also checked the bios settings for fan optimisations, setting the fan speed to "cool" really didn't make a big enough of a difference.

How to fix Intel Nuc - System has recovered from an over temperature condition

After spending many hours on this I came to the conclusion that the problem was not fixable an an RMA would be necessary. If you have this issue then get in touch with Intel to arrange an RMA - if your NUC is still under warranty.

If your NUC is no longer covered by the Intel warranty then you can get passed the problem by disabling the Intel turbo boost option in the Bios.

Enter the Bios using the F2 key at startup then navigate to Advanced and uncheck the "Use Turbo Boost" option.