Articles of the Week

Pubbies of the Week

The Magic Mouse

Categories: Tech | Pubby Cash Received:  0

The Magic Mouse is a mouse that is made by Apple. You can buy this mouse online and at stores that sell them. What makes them so magical? Well, they practically have infinite battery life, 100% wireless, and have many cool features that other mouses do not obtain. That is why the magic mouse is very cool....  Read more

Home Mail Server?

Categories: Tech | Pubby Cash Received:  0

It sounds like a great idea to set up a mail server at home. It is not difficult to do so. All you need is to install an HMailServer and run it on your home computer 24 hours per day. You will get featured emails like [email protected]. Isn't that cool? However, you might end up being able to receive emails only while lacking the ability of sending emails to the outside world. You might think is port 25 (the port of sending emails) open? Yes, it is absolutely open, not blocked by firewall and home router for sure. You have gone through all the settings on your side, and still cannot solve the problem. The reason is: your ISP blocked port 25 for the reason of avoiding email spamming. How to check if your ISP has this port blocked? Here is my method: use "cmd" to open the command window, and then type "telnet 25". If you get connection errors, that means your email sending (via port 25) ability has been restricted. You probably need to enable telnet first by opening this feature in windows. There are a bunch of articles on the internet guiding you how to do this. To check if your server's specific ports are open, in addition to the above telnet method, you can also go to, and enter a port to check. It will return an error if it is not open. And then you can do some troubleshooting accordingly. The final question is: How to solve the problem? How to bypass your ISP's port 25 restriction? You could use an smtp relay service through a third party which allows you to connect to their smtp server at a port other than your blocked port 25, and they will send out the email for you. The downside is the free version of this service usually put a limits on the daily or monthly emails you can send out. However, if you are running a home server as the title says, not for large scale business use, a 100 emails per day limit does not sound too bad. ...  Read more

Kaprekar's Constant

Categories: Tech | Pubby Cash Received:  0

6174 is known as Kaprekar's constant after the Indian mathematician D. R. Kaprekar. This number is notable for the following rule: (1) Take any four-digit number, using at least two different digits. (Leading zeros are allowed.) (2) Arrange the 4 digits from highest to least to form the greatest number possible with those 4 digits. Then do the opposite and arrange those digits from least to highest to form the smallest number. Subtract the smaller number from the bigger number. Go back to step 2 and repeat. The above process, known as Kaprekar's routine, will always reach its fixed point, 6174, in at most 7 iterations. Once 6174 is reached, the process will continue yielding 6174. The only four-digit numbers for which Kaprekar's routine does not reach 6174 are repdigits such as 1111, which give the result 0000 after a single iteration. All other four-digit numbers eventually reach 6174 if leading zeros are used to keep the number of digits at 4....  Read more


Categories: Tech | Pubby Cash Received:  0

Computers are super cool and you can do a bunch of things with them. For example, you can do coding on it. You can code websites, games, and more. I even used a computer to type this article. You are probably reading this article on a computer. That is why computers are super cool....  Read more

Apple Watch Series 4

Categories: Tech | Pubby Cash Received:  0

We would like to let everyone know about the all-new Apple Watch Series 4. Coming in 40 and 44 mm sizes and much bigger screens (40mm is 35% bigger and 44mm is 32% bigger), this luxury and sporty fitness watch is a beast for doing your everyday tasks. The curved screen allows shortcuts to be made in the corners, and with 50% louder speakers, you can blast the music on the bus, at home, or anywhere. While the Apple Watch is much better redesigned back for LTE users, which provides better connection, it contains a twice as fast processor, with a S4 dual-core 64-bit CPU. The Apple Watch Series 4 has an electrocardiogram sensor, letting you take an electrocardiogram measure using the digital crown. The electrocardiogram will warn you of AFib, which of course, is good to know. Brand-new accelerometer and gyroscope are rising in quality, with twice the dynamic range and can detect and read motion data 8 times faster than the regulars. The Apple Watch Series 4 will know if you fall and will call emergency services after 60 seconds. The Apple Watch Series 4 is the perfect device for the sporting spirit in the fitness enthusiast. Show off to your friends with your all-new Apple Watch Series 4! Check out the Apple Watch Series on Amazon! ...  Read more

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