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.

How To Safely Email User Generated Content

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Grow Your Service Via Content Sharing and Invitations — But Do It Safely Are you building systems that allow users to share information via email? Do you distribute “invite a friend” or “share with a friend” email messages? High-growth online services use creative approaches to tap their user base to increase community involvement and grow their brand. When done well, this can boost adoption and increase idea diffusion, but there’s also a downside risk that could seriously harm your brand. Well-intentioned sharing systems can be abused by spammers and fraud artists. You can limit your risk by building safeguards into

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Simple Webhook Testing Using Sinatra and ngrok

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Webhooks allow for simple, deep integration between apps and services, but debugging them can be a little painful. We have a general guide to debugging webhooks, but you probably want to know what the quickest webhook test environment is for setting-up and using. It’s hard to beat Sinatra and ngrok for this purpose. Or, if you’d rather use node.js, you can check-out Martyn’s post on Testing Webhooks. Getting Started First, you need a ruby environment that has rubygems. If you are new to ruby, then check out rbenv for getting your environment going. Create a new directory and run gem install sinatra. Now let’s

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Email Marketers: We Dedicate This Month to You!

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Now that we’ve all had a month to recover from the holiday cheer, it’s time to get down to business. In a previous blog, we introduced our 12 Moment Marketing New Year’s Resolutions, where we dedicated twelve days to delivering tips to email marketers who want to capitalize on moment marketing opportunities in 2015. This time around, we’re dedicating the month of February to you, the email marketers who plan to push the envelope on their email programs in 2015. As you might imagine, email is top of mind here at SendGrid. We have teams dedicated to improving every element of

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SendGrid Goes Mobile: Announcing the SendGrid App for iPhone and iPad

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Today, we’re excited to announce the availability of our SendGrid App for iPhone and iPad, now on the App Store. SendGrid’s mobile app allows SendGrid customers to stay connected to their SendGrid account while on the go. With the app, they’ll be able to interact with the most critical features of their accounts in real time. The new SendGrid app is a great tool for all our metrics-focused customers who want to access open, click, and unsubscribe rates any time they like. With the SendGrid app, customers can regularly share analytics and other metrics with their team and stay up

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Confirming Why SendGrid Built Its Own MTA

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A number of people, both inside SendGrid and out, have asked me about our decision to build our own message transfer agent (MTA) versus using one of the commercial products that exist in the market. In light of recent market news concerning the merger of two commercial MTA vendors, I thought it would be a good time to share my thoughts on this. Back in the day In the very beginning, SendGrid used a modified version of Postfix, one of the most popular open source MTAs, to receive and deliver email. This worked pretty well until we started running into

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Google Inbox: Insights and Predictions

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At the close of the year we sat down with Paul Kincaid-Smith, SendGrid’s VP of Email Delivery, to get his take on Google Inbox. With Google just releasing usage stats for Inbox, we thought we’d share what he had to say: 1. How does Google Inbox increase productivity? Google Inbox cuts through email clutter. We receive more email than ever before. According to the Radicati Group, almost 200 billion are sent every day–about twice as much as only five years ago. Much of it we have asked for and want, but may not want to read right away. Google Inbox helps

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2015 Predictions for DevOps

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The following is a guest post from Matt Chesler, DevOps Architect for TheLadders, the premier mobile network for career driven professionals. We sat down with Matt to learn about what he thinks lies ahead for DevOps in 2015.  Q: How do you think adoption of DevOps practices (Agile, etc.) will change in 2015? A: DevOps practices aren’t going to change, they will continue to grow. If you look at current DevOps job listings and listen to what recruiters are looking for, DevOp engineers, etc. are becoming far more prevalent than they used to be. There’s recognition in the industry that this is

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