Check your list before a YAMM merge

YAMM sends what your sheet says — including the mistakes. Pre-flight Check reads your list and your {{tags}}, finds the broken fields, blank names, dupes and typos, and shows you every email before YAMM sends it.

• Tags matched YAMM's way: exact header spelling, {{Column|fallback}} fallbacks.
• Merge status rows: see what a re-run would skip or re-send.
• Quota against YAMM's daily limit (verified date stated, never promised).
• A Ready to send tab YAMM maps with no fiddling.

See how it works · Prices (checking is free)

Mail Merge Pre-flight Check is not affiliated with YAMM. YAMM is a trademark of its owner, named here only to say what this checks lists for.