What a proposal read receipt actually tells you — and where it goes wrong

Freelancers and small agencies often turn to email tracking tools after sending proposals and receiving no response for days. A read receipt works by embedding a tiny remote image in the email; when the message is opened and images load, the server logs a timestamp. However, the signal is far less reliable than it appears — corporate mail systems routinely block remote images, security scanners can trigger false opens, and Gmail caches images in ways that suppress repeat-open counts. Because proposals are frequently forwarded to decision-makers, technical leads, or procurement teams, multiple opens cannot be attributed to a single reader. The author argues the open signal is still worth having for gauging whether a document is circulating, but warns against treating it as precise data when crafting a follow-up strategy.