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 SendGrid Found the SpamAssassin Y2K10 Rule Bug

Carly Brantz Product, Technical
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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 ›


Joe Scharf Joins SendGrid

Carly Brantz Company
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We are very happy to have Joe Scharf join our team.  Joe has tremendous technical experience as well as business development experience having degrees in Computer Science, Electrical Engineer, and an MBA.  Joe will wear many hats in the team so don’t be surprised if you see him all over the place.  Joe will help […]


Categories of Email Statistics

Carly Brantz Company, Product
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Different types of emails vary in interest to users.  Emails such as shipping alerts, forum notifications, and account confirmations are well received by users and hardly generate any complaints since users already expect these emails.  On the other hand, unexpected emails such as certain newsletters, or email invitations from contact imports on sites such as […]


Special Thanks

Carly Brantz Company
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With this being our first blog post, we would like to thank TechStars for being such a wonderful help during the summer.  They helped us get to where we are today.  We cant forget the companies that shared the jouney with us! =) Stay tuned for updates from our blog from time to time!