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Monthly Archives: October 2012

Poisoning Spamtraps

Today’s question comes from Dave in yesterday’s comment section. I wonder if spammers might submit harvested addresses to big-name companies known to not use confirmed opt-in just to poison what they believe might be spamtraps? It’s certainly possible that people submit addresses to forms and big-name companies. But I don’t really think that poisons the […]

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Harvesting and forging email addresses

For the contact address on our website, Steve has set up a rotating set of addresses. This is to minimize the amount of spam we have to deal with coming from address harvesters. This has worked quite well. In fact it works so well I didn’t expect that publishing an email address for taking reader […]

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MAAWG presents the first J.D. Falk award

Last week at MAAWG went much like all MAAWG conferences go: too much to do, too many interesting panels to attend, too many people to connect and work with, a plethora of very interesting keynote speakers and a total lack of sleep. Most of what happens at MAAWG is not public, but some of the […]

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Setting up DNS for sending email

Email – and email filtering – makes a lot of use of DNS, and it’s fairly easy to miss something. Here are a few checklists to help: Data you need before you start: What this looks like in email headers:

How to check your DNS You can use the simple DNS lookup tools at […]

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Retrying mail to AOL

I’m working on stuff for MAAWG so I’m really not all that up on what’s happening in the world of email recently. A lot of folks are commenting on my AOL post, and I’m hearing that queues are backing up and emptying as AOL makes changes. One thing people have been asking me is if […]

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Mail problems at AOL

Over the last few months there have been ongoing mail problems at AOL. These problems are all over the map and are resulting in a lot of delayed and unsent email. People are reporting a number of different error messages from AOL mail servers. These messages don’t seem to always be accurate or correct. A […]

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Canadian anti-spam regulations

Canada passed an anti-spam law in 2010. Implementation of this law (CASL) were initially scheduled to go into effect in 2011. That deadline has passed and it’s not looking good for a 2012 date, either. Canada’s Radio-television and Telecommunications Commission is the agency responsible for enforcement and rulemaking. This week they published 2 bulletins to […]

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Can I assume consumer and business filtering is the same?

Today’s question comes from Steve B. I wondered if you know much about hosted email providers such as google apps, Microsoft and yahoo. I have seen a rise in number of people using them to provide their corporate email service.   I am using the same logic that the rules governing delivery to gmail will effect […]

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Subject lines

There has been a lot of discussion in various places recently about subject line length and how it affects email marketing. There have been multiple studies done on how the subject line affects opens and clicks. (Mailchimp, Alchemy Worx, Mailer Mailer, Adestra). The discussion has even spilled over into Ken Magill’s newsletter today. I’ve had […]

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Want to learn about Networking and the Internet?

You can trust the “experts” that populate Facebook. Or you can take An Introduction to Computer Networks from Stanford University. This is an introductory course on computer networking, specifically the Internet. It focuses on explaining how the Internet works, ranging from how bits are modulated on wires and in wireless to application-level protocols like BitTorrent […]

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  • HE.net DNS problems

    Hurricane Electric had a significant outage of their authoritative DNS servers this morning, causing them to return valid responses with no results for all(?) queries. This will have caused delivery problems for any mail going to domains using HE.net DNS - which will include some of their colocation customers, as well as users of their free services - but also will have caused reverse DNS to fail for most servers hosted by Hurricane Electric worldwide, so if any of your mail is being sent from HE hosted machines you may have seen problems. (We're HE customers so we noticed. Still happy with them as a vendor.)No Comments


  • 65.0.0.0/8 DNS issues

    If you're sending email from any address beginning with a 65 - in 65.0.0.0/8 - it's possible you'll see some delivery problems. Something appears to be broken with dnssec signatures for the reverse DNS zone, leading queries for reverse DNS to fail for anyone using a dnssec aware DNS resolver (which is almost everyone).1 Comment


  • Our green bar certificate is going away

    Later today we'll be switching from an Extended Validation ("green bar") SSL certificate to a Domain Validation certificate. This isn't exactly a planned change but I'm waiting for responses from Comodo before I go into it too much. I'll share some more details next week.3 Comments


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