Avoiding Spam Filters

Are your emails getting through? Maybe they're getting caught by SpamAssassin or some other overzealous spam filtering system! Here are the top tips to help you reduce the chances of your message getting caught up in the same net as all those "Get Rich Quick" schemes, herbal viAgr@ ads, Nigerian scammers offering you millions in exchange for your credit card number, and phishing messages telling you to confirm your  account details with some bank you've never heard of in somewhere near BFE.

#1 Don't worry too much about the specific rules a spam filter is using. They're designed to trap spam and if you're not sending it, you should be okay.

#2: Make sure your email headers aren't telling porkies (pork pies, lies?). The From should be your real email address, the To, the intended recipient, and the timestamp should be correctly formated.

#3: Use a decent email client, not one that is used commonly by spammers. That way, your messages should be correct from the technical point of view and so won't trip the wire.

#4: Don't encode your messages unless you really need to.

#5: Do NOT add a statement in your .sig saying that you're not sending spam. Spammers always do this and your messages will be flagged. In fact, don't add any irrelevant info to your signature, who cares if you scan for viruses and trojans, I do that at this end, before emails are opened.

#6: Write in proper language. Don't use ALL CAPS, don't add huge amounts of space between lines, and don't odd characters and hacker speak to try and look sm@rt

#7: Don't send html emails from MS Word. Its coding is crap and looks tremendously spammy, moreover don't make any text invisible in your html emails. Better still, use ascii only.

#8: Avoid chatting about spammy subjects. Do you really need to discuss your new Rolex watch or your sexual activities, drugs, debt treatment, porn, erection problems (unless you've got nothing else to talk about, of course!)

#9: Don't use 'bulk-emailing' programs. These stand out a mile to most spam filters and get a heavy weighting, especially if you really have to tell someone about using your Rolex to solve your erection problems.

#10: Final tip, test your email setup against known systems running spam filters, such as SpamAssassin, if you get a bounce, study the headers and try to work out what it is that was bouncing you. I did some press release writing for a major publisher recently and was getting bounced repeatedly. Turns out they were filtering the subject line "Press Release". Clever...

More on avoiding false positives when sending messages can be found in the SpamAssassin Wiki on which this top ten tips list was loosely based. Of course, if you're really sending spam, stop it right now! It's a pain in the effin' butt.