Author Archives: Jillian Wohlfarth

About Jillian Wohlfarth

As SendGrid's Senior Manager of Content, Jillian is responsible for ensuring that SendGrid provides valuable thought leadership content through the blog, whitepapers, webcasts, case studies, and more. An editor and writer by trade, Jillian considers The Chicago Manual of Style one of her favorite reads.

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Articles Posted by Jillian


4 Factors that Affect Email Deliverability

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The following is part of a series of guest posts from Windows IT Pro that takes an in-depth look at SMTP. So far, we’ve learned about the history of Simple Mail Transfer Protocol (SMTP) and examined various definitions for when an email is considered “delivered.” In this final post from Windows IT Pro, they examine 4 key factors that affect email deliverability. Many factors can affect deliverability, including having a good sending reputation, properly authenticating your mail through SPF and DKIM, and having strong permission practices. But four factors really stand out: The health of the messaging infrastructure What’s in the

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A Q&A With SendGrid’s Delivery Experts

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I love working in email because there’s always something new to learn. But sometimes with all of the protocols, stats, and new laws and regulations (like CASL and the Russian Data Localization Law) it can all feel a little technical. Recently, I’ve seen a lot of delivery and inboxing stats shared in the industry that haven’t had a lot of context or explanation as to what they mean and why they’re important to customers. So I thought that I’d sit down with some members of our delivery team, especially our Delivery Consultant, Luke Martinez, to help me demystify what some of

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SMTP and Email Deliverability

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The following is part of series of guest posts from Windows IT Pro that takes an in-depth look at SMTP. Last week we shared the first in a series of posts on the history of Simple Mail Transfer Protocol (SMTP) from our friends at Windows IT Pro. The first post explained the origins of SMTP and how it’s influenced how we email today. It ended by saying: The use of IP means that we can depend on SMTP to eventually get the message contents to a server, but what happens to it after that is up to the server. Imagine

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SMTP and the Evolution of Email

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We worked with our friends at Windows IT Pro to take an in-depth look at the history of Simple Mail Transfer Protocol (SMTP). The following is a guest post from their team that covers the origins of SMTP, the evolution of email, and what SMTP does, and doesn’t do. SMTP Defined The Simple Mail Transfer Protocol (SMTP) has a name that perfectly describes its origin and intended purpose. SMTP was built to be a lightweight, easy-to-implement means to transfer plain-text messages between devices. The original SMTP standard distinguished between a mail transport agent (MTA)—what modern administrators would call a server—and

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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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Blacklisted? Check These 7 Popular Blacklists To Keep Your Reputation Intact

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Earlier this spring, we shared 5 resources that can help you keep track of your sending reputation. Another good way to keep a check on your reputation is to find out if you are on any blacklists (a.k.a. blocklists). Blacklists contain lists of IPs or domains that pose a threat to consumer inboxes. Your email service provider may automatically alert you if you’re added to one, but it’s good to check for yourself. If you are on a blacklist, act quickly. Just a few spam complaints can add a legitimate sender to a blacklist. Here’s an example of what it

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5 Ways to Check Your Sending Reputation

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We always stress the importance of a strong sending reputation. By keeping an eye on your engagement (opens, clicks TiNs, etc.) and reputation (spam complaints, spam traps, unknown users, etc.) metrics you’ll get a good picture of how your emails are being received by subscribers. But if you’re looking for another measure of your reputation, you can take advantage of a handful of resources that will let you know where you stand. Here are 5 sites that will help you check your sending reputation and keep you on track: SenderScore.org Like a credit score, a Sender Score is a measure

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