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Deliverability, Return Path, List-Unsubscribe Header

Here are a few blog posts covering the email industry from Constant Contact, Return Path, and SpamResource. Constant Contact posted a blog post about how they measure email deliverability on January 10th.  They started with just tracking bounce backs and using that metric to calculate deliverability but then moved to using seed list through a […]

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ReturnPath on DMARC+Yahoo

Over at ReturnPath Christine has an excellent non-technical summary of the DMARC+Yahoo situation, along with some solid recommendations for what actions you might take to avoid the operational problems it can cause.

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Do Gmail tabs hurt email marketing?

Earlier this year, Gmail rolled out a new way for users to organize their inbox: tabs. Tabs were an attempt by Gmail to help Gmail users organize their mail, particularly programmatically generated email like social media alerts and marketing mail. While many of us took a wait and see approach, a number of email marketers […]

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Return Path releases inbox benchmark study

Earlier this week Return Path released their quarterly inbox placement benchmark study, and the results aren’t good. According to this data, 22% of opt-in emails are not making it to the inbox. An interesting note is that 25% of email from social networks never makes it to the inbox. This is a challenge for social […]

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Return Path partners with Symantec

Today Return Path announced a partnership with Symantec to improve their anti-phishing product. Return Path is incorporating the Symantec Trusted Domain List into their authentication and filtering product to help customers protect their brands. Press Release Phishing scams affect everyone, and having a brand that is used in phishing can reduce consumer trust in that […]

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Return Path on Content Filtering

Return Path have an interesting post up about content filtering. I like the model of 3 different kinds of filters, in fact it’s one I’ve been using with clients for over 18 months. Spamfiltering isn’t really about one number or one filter result, it’s a complex interaction of lots of different heuristics designed to answer […]

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Delivery and marketing, another view

In addition to posting some of my thoughts about how delivery and marketing have different and possible contradictory constraints, I asked folks on the Only Influencers list what they thought. They had some different perspectives, primarily being marketers. One person even welcomed me to the dark side. The general response from the marketing side of […]

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Return Path speaks about Gmail

Melinda Plemel has a post on the Return Path blog discussing delivery to Gmail.

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Holomaxx v. MSFT and Yahoo

I mentioned way back in January that Yahoo had filed a motion to dismiss the case against Holomaxx. Microsoft filed a motion to dismiss around that time, although I didn’t mention it here. And, of course, Holomaxx filed a motion in opposition in both the Microsoft case and the Yahoo case. Nothing terribly interesting here, […]

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Goodmail alternatives

A number of Goodmail customers are scrambling to identify alternatives now that Goodmail is shutting down. There are two companies in the field offering similar services. Return Path offers Return Path Certified. A number of large ISPs accept Return Path certification, including Yahoo, Hotmail and Comcast. IP addresses that are certified are not guaranteed to […]

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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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