Update (May 28, 2023): Minor updates to code examples.

Outlook DPI scaling is one of the most common problems encountered when developing emails and supporting Outlook (alongside the 1px horizontal line issue). The severity of impact caused by DPI scaling depends on what you’re trying to accomplish with the email’s design/layout/structure, and how the email is coded.

At Litmus Live Boston and San Francisco this year, I gave a talk on correcting Outlook DPI scaling issues, while also looking at how it applies to Hybrid development, and touched on some other aspects it impacts that are common in email development today.

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