BLOG

Monthly Archives: October 2018

SPF and TXT records and Go

A few days ago Laura noticed a bug in one of our in-house tools – it was sometimes marking an email as SPF Neutral when it should have been a valid SPF pass. I got around to debugging it today and traced it back to a bug in the Go standard library. A DNS TXT […]

1 Comment

Jane! Stop this crazy thing!

One of the consequences of moving to Ireland is I’m unsubscribing from most commercial mail, including some lists I’ve been on for a decade or more. Sadly, many of the companies don’t ship to Ireland, or their shipping costs are prohibitively expensive. Even if I wanted to purchase from them, I couldn’t. This process has […]

2 Comments

Spamhaus DBL

Over the last few months I’ve gotten an increasing number of questions about the Spamhaus DBL. So it’s probably time to do a blog post about it. Last year I wrote about the DBL: DBL is the Domain Block List. It lists domains and not IP addresses. I’ll be honest, I don’t have as much […]

No Comments

Twilio acquires Sendgrid

Woke up this morning to the news that Sendgrid has been acquired by Twilio in an all stock deal. This fills a gap in Twilio’s platform, they didn’t seem to have any email capability before. I’m wondering how this will shake out in the broader email industry. Sendgrid is one of the biggest providers of […]

No Comments

Good morning DMARC

I’m thinking I may need to deploy DMARC report automation sooner rather than later. … and so on, and on, and on for a lot further down the mailbox.

3 Comments

Company responsibility and compliance

I blogged a few times recently about Zoho and their issues with malicious actors abusing their platform. They asked me to post the following statement from their CEO Sridhar Vembu. Unfortunately phishing has become one of the bad side-effects of Zoho’s rapid growth over the last couple of years, especially the growth of our mail service. […]

No Comments

2018 JD Falk Award … a mailing list

It’s M3AAWG time. Even though we’re not there, I’m getting regular updates from friends and colleagues who are there. Yesterday, was the presentation of the 2018 JD Falk award. The award recognises “a particularly meritorious project undertaken by a dedicated individual or group reflecting the spirit of volunteerism and community building.” In this case, the award […]

No Comments

Fun with spam filters

I recently had a challenging travel experience in the Netherlands, trying to get from Schipol airport to a conference I was speaking at. As part of my attempt to get out of the airport, I installed UBER on my phone. There were some challenges with getting UBER to authorise my phone number, so I tried […]

No Comments

All filters are not equal

Many questions about delivery problems often assume that there is one standard email filter and the rules are the same across all of them. Unfortunately, this isn’t really the case. The biggest divide is consumer versus business filters. Business filters don’t really care about things like engagement. A sender could have near perfect engagement with […]

2 Comments

DNS Flag Day

There are quite a lot of broken DNS servers out there. I’m sure that’s no surprise to you, but some of them might be yours. And you might not notice that until your domains stop working early next year. DNS is quite an old protocol, and when it was originally specified there wasn’t really a […]

No Comments