For B2B re-engagement, a highly effective subject line is "Are you still with [Company Name]?". This personalizes the email at scale by dynamically inserting the contact's employer. It grabs attention and prompts an open to confirm or update their status, successfully re-engaging them with your content or offers.
From Nov 20th to Dec 20th, sending a personal letter-style email from a founder or executive to unengaged contacts can increase open rates by 40%. The key is changing the "from name" to a person, not the brand, and using a subject line that acknowledges their absence. This strategy works for both B2B and B2C brands.
Using subject lines like "Verify your active status" can lift open rates by 27-31% for contacts who haven't engaged in over a year. While effective for reactivation, this slightly gimmicky approach will also annoy some users, leading to a higher-than-usual unsubscribe rate and negative replies, which requires 'thick skin'.