Recently, I had to update the code on a website that I made several years ago. The process included, among other tasks, converting all the <b> and <i> tags to <strong> and <em>. After playing around with the it for a while, I determined that the most efficient way to find and replace the old tags with the new ones was to do a search for b>, and then to replace it with a strong>.

By seaching for the b>, I avoided having to sift through all occassions of the letter b in the source code and content. The same would hold true for the <i> tag: simply search for i> and replace with em>

Earlier this morning, back when it was still dark out and I was too tired to turn on the lights in my office, I was seated at my desk, using the stark lighting of the monitor to see the keyboard. (Sound familiar to anyone?) I was using the calculator to figure out some basic maths (Sorry to Mr. Molnar, my maths teacher, for needing to use a calculator for basic addition), when I got this amazing message on the calculator: Result of function is undefined.  How cool is that! Suddenly inspirted, I flicked on the light and tried to re-create whatever computation I had just done to achieve that message.  I tried for several minutes before I started to think it was all a dream in my head. Good thing I remembered to save a screen shot.

When setting up a web and email host account, properly setting the default email address will save the web administrator headaches when it comes to dealing with spam. Recently I came across a great example that reenforces the importance of this fact. On the web host account for a small conference and training centre, the default email address had been set to ‘catch-all.’ After more than 2 years online, the default email address had received more than 18,000 spam messages, totalling just over 98MB! Now, that’s a lotta junk!

The default setting for the default email address for a web host account is as a ‘catch-all’. That is, all unrouted email sent to a particular domain but will be forwarded to the ‘catch-all’ address. The idea behind that is if, for example, a client tries to send an email to timanderson@example.com instead of tomanderson@example.com, the email still stands a chance of delivery as the web administrator for the example.com domain can forward the ‘typo’ email along to the intended addressee.

Now enter spam to complicate the matter. As I have previously noted, about 75% of all email is spam. Much of spam is sent to a series of email addresses at a particular domain, with the hope that at least some of the email spam gets through. A spammer might send emails to tim@example.com, tim19@example.com, tomanders@example, etc. If the true email address is tomanderson@example.com, then all the above spam would be funnelled into the ‘catch-all’ or default email address.

The decision that a web administrator must make then is to decide how to manage over-taxing the web server by accepting and dealing with misdirected email (the majority of which is deliberately mis-addressed). The web administrator would also need to consider the time requires of reviewing misdirected email.

My recommendation is to set the default email address to ‘blackhole’. The result of that is the deletion of all misaddressed emails, without being directed to the default email address. The benefits of this are two-fold: (1) it saves the web administrator the time-consuming task of reviewing misdirected emails and (2) it does not provide the spammer with any feedback as to the validity of an estimated email address.

An alternate option is to set the default email address to ‘fail: no such address’. This setting returns a ‘No such address’ email notification to the sender of any misdirected email. Whilst this might prove beneficial to a client or supplier who mispells an email address, the greater concern is providing spammers that sending such emails to every piece of spam that arrives. (I would argue that the average internet user is aware that emails do go missing from time to time and that it’s advisable to follow up with a phone call when sending important or time-sensitive matters.)