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.


5 Key Practices to Avoid the Spam Folder

Best Practices
Key Practices to Avoid the Spam Folder

According to MAAWG’s Email Metrics Report released in November 11, almost 90% of the emails included in their study were considered to be abusive. Spam and other malicious emails continue to plague customers, ISPs and legitimate senders so to ensure your emails get delivered to the inbox, you have to follow a few key email best practices.

  1. Focus on your sending reputation. ISPs look at your sending behavior to make filtering decisions. If you have a good sending reputation, your emails will get delivered, but if not, your emails may end up being blocked at the gateway or labeled as spam.
  2. Regularly monitor your email deliverability.  Rectify delivery failures right away, otherwise you risk harming your sending reputation. Access tools that that not only tells you who responded to your messages, but who actually received them. This data can also help you better understand your overall analytics and identify gaps in your email program. Read More ›

How SendGrid Found the SpamAssassin Y2K10 Rule Bug

Product, Technical
OMG_

One of the many things SendGrid does on the backend to determine if a user is having deliverability problems is scan the content through multiple enterprise spam filters multiple times per day for every user.  Some of the filters include Postini, CloudMark, Brightmail, IronPort, Barracuda, Mail Foundry, and SpamAssassin.  These filters are additional filters from our delivery monitory to ISPs such as Hotmail, Yahoo, Gmail, and AOL.  In the last couple of days we noticed that a lot of legitimate emails were triggering the SpamAssassin filter.  The following shows how our graph looks like: Read More ›


Considerations When Switching ESPs

Jacob Hansen Best Practices
email delivery
Senders who make a choice to use any Email Service Provider (ESP), such as SendGrid, are always looking for good email delivery. They want the email sent out on a daily/weekly/monthly basis to get out the door successfully and reach the intended recipients. This success largely involves making sure the sender is following email best practices. However, even if you already are following best practices, there are additional considerations when switching ESPs. Read More ›

The Email Ecosystem: From Start to Send

Jacob Hansen Best Practices, Email Marketing
how email works
As we’ve worked with marketers and developers, we’ve found that there is definitely different languages used by each group. But the end goal for both is the same – good delivery in a complicated email ecosystem. We created the following infographic to provide both developers and email marketers with valuable email delivery information and tips. Read More ›

SendGrid’s Approach to NPS: Specific Things We Do While We Keep Our Sights on What Matters Most

Company
sendgrid-2
SendGrid recently revamped its Net Promotor Score (NPS) system which needed a survey process that would a) capture a lot of data b) allow us to close the loop with customers in near real-time and c) analyze and report on the data. Matt Thelen, who manages SendGrid's Strategy, Research, and Insights initiatives provides tangible and specific examples of how this was achieved at SendGrid. Read More ›