About this tool
Paste addresses to inspect syntax, case-insensitive duplicates and common domain typos.
Review the result for your task before using it elsewhere.
Suggestions do not change the list. Valid syntax proves neither mailbox existence nor deliverability.
Frequently asked questions
How do I use this tool?
Paste addresses to inspect syntax, case-insensitive duplicates and common domain typos. Review the result for your task before using it elsewhere.
What limitations should I check first?
Suggestions do not change the list. Valid syntax proves neither mailbox existence nor deliverability.