The Marketing Millennials

Subject Line Tactics You Haven’t Tried Yet | Bathroom Break #96

Feb 23, 2026
They test weird subject line tactics that break inbox patterns to trigger opens. They explore all-caps, no-caps, single-word caps, emoji branding, and pattern-interruption hooks. They recommend numbers, timeliness, and audience-specific words to increase relevance. They tease accidental reveals and reverse-psychology lines to spark curiosity without giving everything away.
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ADVICE

Test All Caps Subject Lines

  • Try all-caps subject lines as a deliberate test to boost opens.
  • Daniel Murray reports all-caps beating normal case by ~3–4 percentage points in his tests, despite sounding “scary” in the inbox.
ADVICE

Use A Signature Emoji For Recognition

  • Use a consistent recognizable emoji in your subject lines to build inbox recognition.
  • Daniel says an emoji in every email helps people recognize the sender and improves repeat open rates for newsletters.
INSIGHT

Weird Tests Beat Best Practice Uniformity

  • Distinctive sender signals (case, emoji, pattern) outperform generic 'best practice' subject lines.
  • Jay argues tests that look weird—no caps, all caps, single-word caps—break algorithmic sameness and win attention.
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