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One-Click Unsubscription

Unsubscribing from mailing lists is hard. How many times have you seen a message "please remove me from this list," followed by two or three more pointing out that the instructions are in the footer of every message, followed by three or four more asking people to not send their replies to the whole list (all sent to the whole list, of course,) perhaps with a final message by the list manager saying she's dealt with it? more

The Kindness of Strangers, or Not

A few days ago I was startled to get an anti-spam challenge from an Earthlink user, to whom I had not written. Challenges are a WKBA (well known bad idea) which I thought had been stamped out, but apparently not. The plan of challenges seems simple enough; they demand that the sender does something to prove he's human that a spammer is unlikely to do. more

Trump's Fundraising Email - Bad Data Drives Delivery Problems

It's a wild election season here in the US. In the past few presidential elections, email has played a bigger and bigger role in messaging and fundraising. President Obama's campaign used email effectively, but sent huge volumes. In fact, the volume was so heavy, it led to a joke on the Daily Show... This year there is a stark difference in how the candidates are using email. more

Growing Interest Abroad for Cloud-Based Email Infrastructure

Between September of 2015 and May 2016, (last 8 months) Port25 saw almost a 30 percent jump in new cloud-based email infrastructure interest outside the United States... While most of the influential senders are not abandoning on-premises mail transfer agent (MTA) solutions, many are looking to cloud infrastructure for managing higher-volumes by bifurcating individual email streams to the cloud. more

Marketo's Path to Being Acquired

Happy Early Memorial Day. Once an ESP or marketing automation company declares itself for sale, there seems to be a mass exodus by investors, which sends up a red flag, (well in this case, a red & white striped flag). This past week there were rumblings about the potential suitors for Marketo. While it is rumored that German company SAP is the front-runner, there are many other potential suitors circling the marketing automation software company. more

Perfect Storm Brewing at ESPs Amidst Growing PowerMTA Admin Crisis

Sometimes, a software company is as much about people as it is about technology. Who says PowerMTA admins don't have influence? Not only are they the influencers of our brand [Port25] they are also the main influencers and decision-makers when it comes to purchasing decisions. more

Macro Observations Facing Email Infrastructure

Last month I attended the 36th annual M3AAWG conference in San Francisco, where esteemed members of the online messaging and anti-abuse community come together to make the Internet a safer and more secure environment. The sending community is highly influential especially among Email Service Providers (ESPs) and truly dominated the two-macro conversations that I participated in. These conversations have the industry in somewhat of a transition. more

Internet Governance Forum Publishes BPs on Regulation and Mitigation of Unsolicited Communications

The IGF this morning published a number of reports, including the aforementioned one, at the URL provided, titled 'IGF 2015 Best Practice Forum Regulation and mitigation of unsolicited communications.' The reports can be found in the included URLs on the IGF Website. more

What's ARC?

DMARC is an anti-phishing technique that AOL and Yahoo repurposed last year to help them deal with the consequences of spam to (and apparently from) addresses in stolen address books. Since DMARC cannot tell mail sent through complex paths like mailing lists from phishes, this had the unfortunate side effect of screwing up nearly every discussion list on the planet. Last week the DMARC group published a proposal called ARC, for Authenticated Received Chain, that is intended to mitigate the damage. What is it, and how likely is it to work? more

Logjam, Openssl and Email Deliverability

RHEL6/Centos6 (and presumably RHEL7/Centos7) machines with the latest openssl packages now refuse SSL connections with DH keys shorter than 768 bits. Consider RHEL6 sendmail operating as a client, sending mail out to a target server. If the target server advertises STARTTLS, sendmail will try to negotiate a secure connection. This negotiation uses openssl, which will now refuse to connect to mail servers that have 512 bit DH keys. The maillog will contain entries with "reject=403 4.7.0 TLS handshake failed". more