Tag: Spam

Dec 20 2014

Mailbait Threats

Back in October of 2012 I devised a way of blocking abuse of my mailing list server by detecting mailbait abusers (mailbait.info offers a ‘service’ to fill your, or someone else, mailbox with unwanted mailing list subscriptions). In June of 2013 I refined the technique. Basically I detected if someone was visiting the mailing list …

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Mar 27 2013

Abuse Addresses

Most ISP’s and network providers have specific email addresses that you can report abuse to. These addresses can be looked up using a whois tool. Recently, I’ve noticed a number of those addresses that just don’t work the way they are supposed to.

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Mar 27 2013

Tech Tip: Don’t use qmail as a mail server

A while ago I added a new anti-spam technique to my mail server setup called “No Listing”. No listing basically means putting a high priority MX record in the DNS that always rejects mail server connections.. It seems, however, that the qmail mail server can’t cope with that.  It’s not RFC compliant.

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Nov 15 2012

Adding Envelope Sender in sendmail

Fair warning: This post is pretty darn technical and is of little interest to people who don’t muck around with Linux and/or mail servers. Recently I had a problem with someone on a midrange.com mailing list where they sent obvious spam. The problem was, they were a subscriber to the list and had posted before …

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Jul 24 2011

DNS: Sends No Mail

I really wish there was a way to indicate, in DNS, that a domain never sends mail. That way, if a mail server recieves mail claiming to be from that domain, it can be discarded out of hand. I’ve got a bunch of domains that JUST do web serving … they never send mail.  If …

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Jan 05 2011

Spam Retaliation

I’ve got a slightly new policy when it comes to spam. If given the option, I’m going to change my email address in the spammers database to spam@uce.gov. So the next time the spammer tries to send ME junk, they will be reporting themselves to the Federal Trade Commission. Yeah, I know, it won’t do …

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Jun 05 2010

Spam Observations

I’ve noticed an interesting trend in the comment spam I’ve been getting (luckily few of it gets through). There seems to be three basic categories …

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Mar 21 2010

Reporting Spam No More

I’ve decided to stop reporting spam to ISP’s. It just seems like an incredible waste of effort on my part. For YEARS now I’ve used SpamCop to report spam to ISP’s (both the mail provider and related web hosts) and have gotten very few non-automated responses.

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Nov 19 2009

Report as SPAM

It’s nice that many of the major mail providers give you the ability to report a message you’ve received as spam … but some of them make it far TOO easy to report something as spam. I’ve noticed that many of the big names put the “Report as spam” button way too close to the …

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Sep 10 2009

Yahoo SMTP Deferrals

As I mentioned before … even though I’m participating in Yahoo’s Email Complaint Feedback Loop, I’m still getting deferrals when trying to deliver mail to Yahoo’s mail servers.   I’ve gotten a few complaints, but not nearly enough to really justify having mail delivery deferred. I think I’ve figured out a bit more about why …

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