Direct answer
For personal Gmail accounts, dots in the username do not change the destination. That rule does not apply to custom-domain Google Workspace addresses.
More questions and answers
Are email addresses with plus signs duplicates?
A Gmail plus-address generally reaches the base inbox, but do not strip plus-tags from every provider indiscriminately. Store the original address and flag likely aliases for review.
How do I find duplicate emails across two CSV files?
Combine the files with source and contact IDs, normalise address text, identify overlaps and keep the correct subscription or suppression history for each contact.
Why does my email list have more rows than unique addresses?
One person can appear several times after CRM imports or signups. Count unique normalised email values, then review duplicates before removing additional contact records.
How do I remove duplicate emails but keep the newest customer record?
Sort by a reliable updated timestamp or use a merge policy, retain the authoritative contact ID, and combine critical fields before dropping duplicates.
Can an email address be duplicated with different capital letters?
Typically, differently capitalised versions should be matched as duplicate for list hygiene. Preserve the original display value but deduplicate against a normalised key.
Should shared inbox emails be deduplicated by contact name?
Not automatically. Several named contacts may reference one shared address; deduplicate sending destinations while preserving separate CRM relationships if needed.
How do I see exactly which email duplicates were removed?
Keep a removal report containing original row ID, normalised email, duplicate group and retained record. That allows an audit or reversal if matching was too aggressive.