Check your list before a GMass merge

GMass 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 GMass sends it.

• Tags matched GMass's way: {FirstName} with {Column|fallback} fallbacks.
• Case and spacing slips between tag and header, caught per GMass's matching.
• Quota against GMass's daily limit (verified date stated, never promised).
• A Ready to send tab GMass maps with no fiddling.

See how it works · Prices (checking is free)

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