SendGrid's Email Deliverability Blog


From email deliverability best practices, to hackathon highlights, API tutorials, and everything in between, the SendGrid blog is your destination for all things email. Browse our most recent posts in the main feed or filter by category. Be sure to subscribe to the blog to get a daily digest of posts and reach out to us in the comments to let us know how we're doing.

The Magic of Email Headers

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Email amazes me. It’s an open, decentralized, and evolving means of communication that allows you to message someone on the other end of the world–-and it’s been around for fourty years. One of the amazing things about email is the depth of the specification. Email has many intricate and little-known parts, many of which are hidden in message headers. Message headers are essential to any email communication–they describe the message, who sent it, and who it’s going to. To, From, Date, and Subject, are all headers most people are familiar with, then there’s the commonly discussed DKIM and SPF, however

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SMTP Service Crash Course

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When you start working with email every day, you take a lot of the basics for granted. Today, we’re re-visiting what an SMTP service is with a quick Q&A with Nigel Dunetts, a member of SendGrid’s amazing Email Support team. 1. What is an SMTP service? On the most basic level, an SMTP service functions as a method to send emails from one server (or mail client) to another across the Internet. For a more in-depth guide to email and SMTP, I usually point people to the following resources: SMTP Server Relay Basics via SendGrid’s blog How Email Works via HowStuffWorks.com

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Send Email with Titanium and SendGrid

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Did you know you can build native apps using web technologies? Titanium Appcelerator does exactly that. And its super easy to get up and running. To keep with the easy theme, I decided I’d develop a library for Titanium developers to simply send email using none other than our favorite email service, SendGrid! Installation Since Titanium uses CommonJS-compliant modules, all you have to do is drop tisendgrid.js in your lib folder. That’s it! Example Due to the CommonJS compliance, you are able to require a module like Node.js and such. It’s as simple as that! The library has several examples and documentation in its GitHub repository. SMTPAPI-Example Lets

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Open Source: Pull Request Driven Development

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Pull Requests are my favorite feature of GitHub. They are the way I prefer to do development. Avoid Communication Breakdown There is necessarily a lot of discussion that happens when writing code. On a team of one, this discussion happens in your brain. On a local team of two or three, it happens IRL. These approaches work ok, but they break down when the team is remote or four-plus people. So, how do you avoid this breakdown in communication? Often, teams turn to an external tool like Basecamp. I recommend against that. Those conversations live too far away from where

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Snow Monkeys and SendGrid: A Match Made in Japan

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In December, we launched our partnership with Kozo Keikaku Engineering in Japan. In February, Brandon and I ventured back across the Pacific to visit our friends and jumpstart our involvement with the Tokyo developer community. It was such an amazing experience, I deemed it worthy of some real estate on the blog. Hopefully you’ll find the story as enjoyable as our trip. Hacking across Tokyo Music Hackday Tokyo Once again we joined the MHD crew for a weekend of hacking, which is always music to our ears. It was a packed house with around 200 people in attendance for the

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Always and Forever: HTTPS Encryption for Gmail

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No love has been lost for the National Security Agency after it was revealed that they were intercepting data between servers and computers. And it had yielded a strong response from Google. On March 20th, Google posted that they will always use an encrypted HTTPS connection whenever users check their mail. This move ensures that no one, not even the NSA, can listen in or read user messages as they move through Gmail’s servers. HTTPs encryption was offered by Google since Gmail launched and was enabled by default in 2010. However, users had the ability to disable it. Today, “always

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March Madness: SendGrid in the News

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It’s been an exciting start to 2014 at SendGrid, with new partnerships, new offices, and new sending milestones to celebrate! March proved to be a busy month, so here’s a short highlight reel: There’s No “I” in Scale A principal benefit that SendGrid offers is scalability—we help our customers seamlessly grow their businesses without having to worry about the cost and complexity of maintaining an in-house infrastructure. The cool thing is, while our customers are scaling…so are we! It was just announced in the Boulder Daily Camera that in May, we’ll be moving our headquarters from Pearl Street in Boulder

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