Email Normalizer

Your list has [email protected], [email protected] and [email protected]. That is three rows in the CRM, three contacts in the campaign and three messages landing on one person, who will hit the spam button by the third. Paste the list here, one address per line, and you get the canonical form of each one with duplicates already dropped and a count of how many were merged.

The rules are not the same everywhere. On gmail.com and googlemail.com dots in the local part are ignored (johndoe and j.o.h.n.d.o.e reach the same inbox) and googlemail is rewritten as gmail. On every other domain only the part after the plus sign is cut and dots are kept, because Outlook, Yahoo and corporate mail servers treat a.b@ and ab@ as different mailboxes. This is provider convention, not an internet rule.

The tool validates nothing: no syntax check, no domain lookup, no proof the mailbox exists, and a line without an at sign comes back untouched. Keep the original address in your database and use the normalized one only as a comparison key; send mail to whatever the person typed. The lowercase toggle helps because domains are case insensitive. The whole list is processed in your browser and never leaves it.