Writing
Use another SMTP server with Postfix
Over the weekend, I finally installed and configured my own e-mail server. What a challenge that was! I’m successfully running Postfix, Dovecot, Spamassassin, Amavisd-new, ClamAV, SQLgrey, and Squirrelmail. I, however, encountered problems sending to Gmail. It returned with the following message: host gmail-smtp-in.l.google.com[64.233.163.27] said: 550-5.7.1 [76.170.212.236] Our system has detected an unusual amount of unsolicited…
Yoggie, a miniature security firewall appliance solution
A friend and coworker of mine, Arthur Freyman, told me about a miniature device that provides all the security you’ll ever need out-of-the-box. It’s called Yoggie. Reading the specs and services it provides is so far pretty good – and not surprising, it runs Linux under the covers. Just think how cool it would be…
Memorable and reliable DNS servers you can use
My area is “owned” by Comcast, now Time Warner, when it comes to cable TV and Internet services. Unfortunately, their DNS servers have become unreliable numerous times over the years. With that in mind, I’d like to share memorable IP addresses of DNS servers that I use that I have found to be very reliable. …
What to check when encountering Exchange user name and password errors
A C# web app I’m developing requires pulling (and deleting already read e-mails) from an Exchange 2003 server. I used the POP3 code that I actually shared/posted about yesterday; however, I was getting this error, though I had the correct user name and password: -ERR Logon failure: unknown user name or bad password. It was…
How to POP3 in C#
Here’s an excellent how-to on using POP3 in your C# apps. I’ve used it successfully. <font face="Verdana" color="#000000" size="2">The Pop3 class derives from the System.Net namespace:</font><font size="2"><span style="color: rgb(0,0,255)">public</span> <span style="color: rgb(0,0,255)">class</span> <span style="color: rgb(43,145,175)">Pop3</span> : System.Net.Sockets.<span style="color: rgb(43,145,175)">TcpClient</span></font><font size="2"><span style="color: rgb(43,145,175)"></span></font> <font size="2"><font face="Courier New"><span style="color: rgb(43,145,175)"><font face="Verdana" color="#000000" size="2">And the class consists of the following fields…
Try Ruby online
Ruby has been getting a lot of praise for a while now, so I decided to give it a try. I was surprised to find so many resources already out there, and one I think worth mentioning is this website. Ruby is a programming language from Japan (available at ruby-lang.org) which is revolutionizing the web.…