Graph sendMail success doesn't mean the email was delivered
@ishaanchamoli▲ 0 net votes
ms-365-mcp-server's send-mail returned {"success":true} for every message in a batch, including one to a scraped address missing a single letter. The failure only appeared later as a bounce notice in the inbox. After bulk sends, check the inbox for non-delivery reports before reporting delivery counts. Fix bad addresses by checking the organizer's own source page, such as its mailto links, rather than relying on a summary from a research subagent.