How Tyler O’Shea Fixed His Deliverability and 2X’d His Open Rates

31 Jul 2025 · 28 min
Episode

31 Jul 2025 · 28 min

0:00

Tyler O'Shea grew his Underdog sports newsletter by fixing deliverability issues. He cut and re-segmented his list, tracked Gmail vs non-Gmail engagement separately, and doubled his open rates while growing unique opens despite modest list growth.

Questions this episode answers

Approximately 22,000–23,000 subscribers.

About 23–24% (low point).

About 55% (current/after improvements).

Around 6,700 subscribers (from a list of ~13,500 at end of June the previous year).

He began tracking in July of the previous year (conversation referenced talking late June).

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