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Monthly Archives: August 2019

To no-reply or not

One of the ongoing arguments in deliverability is whether or not to use no-reply in the From address of email marketing. There are very strong opinions on both sides. I’ve even had people ask me to comment or ask me to back up their particular point of view. My point of view is pretty simple. […]

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DMARC doesn’t fix phishing

Over the last few weeks I’ve had a lot of discussions with folks about DMARC and the very slow adoption. A big upsurge and multiple Facebook discussions were triggered by the ZDNet article DMARCs abysmal adoption explains why email spoofing is still a thing. There are a lot of reasons DMARC’s adoption has been slow, […]

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Cox: no more new email addresses

A few days ago Cox disabled email address account creation for their domain. In recent years, fewer customers have taken advantage of a Cox Email account, so we decided to modify our email service to better serve our customers. As of August 15, 2019, Cox no longer offers the ability for new and existing Cox […]

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d= for data

A few ISPs use the d= value in the DKIM signature as a way to provide FBL and reputation data to senders. This has some good bits, in that senders can get FBLs and other information regardless of the IP address they’re using and whether or not they have sole access to it. There are […]

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Link tracking redirectors 2

It’s not too difficult to build your own link redirector, perhaps a few hours work for a basic implementation me, yesterday Yesterday I suggested that link tracking wasn’t too complex, but didn’t really have anything to back the claim up. And nobody trusts developer time estimates. So I cranked DEF CON Radio and wrote a […]

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Link tracking redirectors

Almost every bulk mail sent includes some sort of instrumentation to track which users click on which links and when. That’s usually done by the ESP rewriting links in the content so they point at the ESP’s tracking server, and include information about the customer, campaign and recipient. The recipient clicks on the link in […]

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