If you’re an email provider, try to reject unwanted mail during the SMTP exchange where possible. Once you accept a message for delivery, then decide that it shouldn’t be delivered, you are faced with the unenviable task of where to send the non-delivery report. You can’t rely on the validity of the “From:” and “Reply-to:” headers, and sometimes even the “Envelope Sender” or “Retrun path” details, because sender credentials are commonly forged in order to divert attention away from the real sender. A misdirected bounce only adds to the spam problem. Even the “Received:” headers can be tampered with.
There are several websites available to help you do your research. The resources provided by WhatIsMyIpAddress and multirbl.valli.org can be of immense help.
Don’t be fooled by claims that you are obliged to pay for removal from one of the UCEPROTECT and Backscaterer lists. If you fix the problem that resulted in the listing, the removal will happen automatically. The payment is only required if you can’t wait a week (or more) after fixing the problem.
For some reason, several Chinese spammers have attempted to contact my Lisati persona with Chinese language messages – click here for an example. Any such messages which make it to my inbox WILL be reported as spam, even if the subject tries to claim that it is NOT spam. For anything that has no connection with Ubuntu, Launchpad, or the contents of this blog, please visit my other blog.
I’m old school and believe that what you type in at the command prompt isn’t necessarily a code, but is nearly always consists of one or more commands (which is why the command line, sometimes referred to as “terminal”, is called the command line). It might seem like some kind of secret code to someone who doesn’t understand what it does, but the intent is to command the computer to do something. What I type might sometimes include codes, but it’s still a command. I might enclose it in “code tags” when sharing it on a forum, but that has more to do with formatting than what it is.
It’s often recommended that you don’t leave your email address visible in forum posts. This is because search engines and data mining spiders regularly look at posted information. You can never be sure if one of the spiders has passed your email address on to spambots – until you get bombarded with unwanted emails.
My email system has a more sophisticated set of spam filtering than that used by the typical home user. Because of this, I’ve set up an information page designed to help people figure out what went wrong if their email to me bounced back as undeliverable. For more information, visit http://lisati.homelinux.com/postmaster
Update, 11 August 2016: I no longer have that domain, so forget it!