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Performance Testing at Postmark

As Postmark is growing, fast and reliable email delivery is becoming a heavier task. At the same time performance testing is more fun. The more emails we are sending, the more details we need to watch out for to preserve the same quality of service.

We have been performance testing Postmark for a long time. Postmark is growing fast and as a result, performance tests are becoming more frequent and more complex.

I would like to share with you a small insight on how we performance test Postmark

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Breaking through to Gmail's Primary inbox

Gmail’s recent inbox update has caused a lot of discussion and frustration in the email marketing community. Essentially, it places all marketing emails (or from Email Service Providers) into a new inbox called Promotions, out of view from the Gmail user’s Primary inbox. While this means less distraction in the inbox, it also means less engagement from the people who are receiving your emails.

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Upgrading and Rotating DKIM Keys

As many of our customers know, email delivery is the core of our business. A big part of ensuring that your emails get to the inbox is email authentication, such as DKIM and SPF. A recent change in Gmail/Google now requires that DKIM keys are at least 1024-bit in length. When Postmark first launched a few years ago, we started with 768-bit keys, which now results in Gmail showing DKIM as “weak” and displaying a “via” tag. Fortunately inbox rates are not affected.

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Automated Testing at Postmark

With Postmark, a day doesn’t go by that I don’t think to myself how simple it is to use it and how fast you can start sending emails.

Simple, easy, fast - three words which are our top priority goals. Achieving all three, especially sending emails fast comes with a price: reliability. From day one, our goal has been to deliver email to you reliably. Losing emails or emails not reaching your inbox has never been an option.

We have been working very hard to maintain this. My main goal today is to share with you what I do, as a tester, to make sure Postmark is doing its job.

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