DKIM is a common email authentication method designed to reduce the opportunities for phishing attacks and email spam.

DKIM Oversigning to Help Avoid Replay Attacks

May. 9, 2022 / By Harold Vass

SparkPost Cloud now performs DKIM Oversigning by default to eliminate an attack vector for the billion+ emails our platform enables each day.  DKIM (DomainKeys Identified Mail) is a common email authentication method designed to reduce the opportunities for phishing attacks and email spam. Combined with other common authentication mechanisms, the chances that your sending domains

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Gmail prefetched images

Update on the Gmail App Prefetching Images

Jan. 25, 2022 / By Chris Adams

Gmail is Prefetching Images, Leading to Marginally Inflated Opens The recent changes with Apple Mail Privacy Protection had us wondering – where else is prefetching happening? While false opens come as no huge surprise, we have additional details around the limited set of circumstances in which Gmail is prefetching images in emails sent to Gmail

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2022 email benchmarks

2022 Email Benchmarks, Trends & Geeky Behaviors

Jan. 19, 2022 / By Koertni Adams

Check out the top 2022 email benchmarks in this new, comprehensive report Email is hard. And effective. And fun! Basically, email rules. 👑 Our new report, Email in 2022, includes almost 50 pages all about why email rules – it turns out we had a lot to say. The report is broken out into three

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ISO 27001 Certified

SparkPost Achieves ISO 27001 Certification in Latest Commitment to Global Security

Jan. 11, 2022 / By Jim Sipe

Drum roll please… 🥁🥁🥁 SparkPost is Now ISO 27001 Certified SparkPost officially has an ISO 27001 certification for our corporate systems and cloud products. We’re proud to have long-term trust by some of the world’s biggest brands with sophisticated email programs, and this internationally recognized certification is the latest achievement in our ongoing dedication to

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How SparkPost Addressed the log4j Vulnerability

Dec. 20, 2021 / By Jim Sipe

A widely used chunk of software code used to do logging on much of the internet called log4j has been identified as having a bug by the broader cyberspace community. Many companies across the world are working around the clock to find and patch the vulnerability in their systems that use log4j code in their

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A collection of several years worth of AOL CD-ROM discs

A Look Back at 50 Years of Email

Oct. 29, 2021 / By Elsbeth Russell

Today, October 29, 2021, we’re celebrating 50 years of email. It’s hard to remember a time when email wasn’t a huge part of our collective consciousness but even just 30 years ago, email was still a strange concept for most. “What, do you write to it? Like mail?!” – Bryant Gumbel 50 years of Email

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Ransomware Attack Keseya Vendors

SparkPost Was Not Affected by the Kaseya Security Incident

Jul. 8, 2021 / By Jim Sipe

As you may have seen in the news, software vendor Kaseya has announced that between 800 and 1,500 businesses have been compromised by a ransomware attack connected to their business. Kaseya said in a statement that approximately 50 of its direct customers were breached in the attack but hundreds more were affected because many of

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email receipt

Creating an Email Receipt

May. 25, 2021 / By Darren Smith

Messaging Engineer, Darren Smith, explains how to create a template that can be used for a Point of Sale (POS) email receipt.

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Email, Duh.

Introducing: Email, duh.

Jul. 10, 2020 / By George Schlossnagle

Founder and Chief Evangelist, George Schlossnagle, introduces his new video series: Email, Duh. and explains the inspiration behind the name.

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email weigh

How Much Does an Email Weigh?

Jul. 6, 2020 / By Sam Holding

Head of International, Sam Holding, shares just how much an email weighs and what senders can do to reduce their carbon footprint.

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Upgrading to TLS 1.2

Upgrading to TLS 1.2

May. 20, 2020 / By Tom Mairs

Director of Customer Success, Tom Mairs, explains how to get yourself prepared to run without the use of TLS 1.1 so we can restrict access to TLS 1.2 only. 

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What SMTP port to use

What SMTP Port Should I Use?

Apr. 20, 2020 / By Owolade Sobowale

SMTP ports are used by SMTP servers to send email. Find out why port 25 is no longer a standard and how to choose among ports 465, 587, and 2525.

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