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.

Email Tools for Early Stage Startups

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Part of my role at SendGrid is to work with accelerator programmes across Europe and help out the teams with as much advice and support that we, as a company, can give them. Getting email right at the earliest stage of a new company is incredibly important, but spending time perfecting it often comes second to all the other demands that are placed on early stage founders. This usually results in teams asking me for tips on how to achieve certain email tasks. As a reference for them (and anyone else who happens across it) here are the email tools

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Advanced Suppression Manager: A Developer’s Example

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One of the great new features recently released by SendGrid and available within the beta Customer Portal is the Advanced Suppression Manager (ASM). For those already familiar with SendGrid, you are probably already aware that if a recipient unsubscribes from your mailing list, they can no longer receive any new email from you. If, for example, I am sending a marketing campaign and one of my campaigns doesn’t fair well, I might lose many possible recipients who decide to unsubscribe from all my future emails including password resets. How can I prevent recipients from unsubscribing from my emails simply due

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Appboy and SendGrid Advance Email and Mobile Marketing Automation Solutions With Expanded Relationship

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The following is a guest post from Matt McRoberts at Appboy. Learn more about Matt at the bottom of this post and learn more about Appboy at Appboy.com. Over the past few years, Appboy has worked closely with premier email provider, SendGrid, to establish a seamless integration between our industry-leading Mobile Marketing Automation solution and SendGrid’s email delivery platform, providing Appboy users with powerful email capabilities. Partnership Benefits Because we recognize the importance and benefit of tying in email to your mobile marketing efforts, we’re pleased to announce the growth of our ongoing relationship with SendGrid, the leading delivery platform for

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Resending Email: Good Idea or Terrible Idea?

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In the fall, we were intrigued by an article on Forbes.com that discusses the value of resending emails to recipients who didn’t open your email the first time. It created some nice discussion in our office, so we turned to our friends at Windows IT Pro, and they helped put some of our thoughts to paper (so to speak!) below: The Findings The article states that during one test with the method, results showed that the second email helped reach 53.2% more people and saw 32.6% unique opens. Impressive stats, but it’s important that we don’t get ahead of ourselves. While it’s true that numbers don’t

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Update on Security Incident and Additional Security Measures

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What Happened On April 8, the SendGrid account of a Bitcoin-related customer was compromised and used to send phishing emails. We initially believed that this account takeover was an isolated incident and worked with our customer to help them recover control of their account and minimize the damage of the attack. After further investigation in collaboration with law enforcement and FireEye’s (Mandiant) Incident Response Team, we became aware that a SendGrid employee’s account had been compromised by a cyber criminal and used to access several of our internal systems on three separate dates in February and March 2015. These systems

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Sender Policy Framework (SPF): A Layer of Protection in Email Infrastructure

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When email is sent from one server to another, simple mail transfer protocol (SMTP) is used to get a message from the sender to the receiver. As an SMTP service, SendGrid facilitates this process. One security weakness in the infrastructure of email is the ability of any sender or host to identify themselves, and their email, as any domain that they wish. This makes it difficult for receivers to trust that a message is actually from who it says it’s from. It also makes senders uneasy knowing anyone out there can send mail from their domain and potentially tarnish their brand’s

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The Trouble with Tech Debt and Information Debt

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It might be weird to imagine, but the first things that come to mind when I think of tech debt and information debt is Star Trek and cats. Specifically, I think of tribbles and wrangling kittens. You might think this is a total stretch, but let me explain… Tribbles are basically little fluff balls that can multiply seemingly exponentially in a short amount of time if exposed to food. They’ll get everywhere, but are easy to capture once you get them away from food. Kittens, on the other hand are wonderful little animals that are so cute and needy, they

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