What to change
The redirect should preserve only the query information the destination is intended to accept. Ask the measurement owner to define the approved campaign fields, then have the developer show that they survive the specific old-domain or old-path rule. Include a harmless unrelated parameter to demonstrate the agreed handling. The result should retain useful attribution without treating every arbitrary query value as necessary or safe to forward.
A worked example
Illustrative example
Illustrative test: Follow a sample email link through the old-domain redirect. Record the final browser address alongside the approved campaign fields so the analyst can reproduce the comparison.
How to check the result
The approved campaign information survives and the page still resolves correctly.
A mistake to avoid
Preserving arbitrary parameters without review can carry unnecessary data downstream.
Your action checklist
Use these checks to prepare a discussion with your team or supplier. Tick a check when you have recorded the decision or evidence, rather than when a feature has simply been promised.
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Further reading
These primary sources provide additional context for the project decisions above.
Related decisions
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