4 ms·All but gmail. That was created in house by Paul Buchheit.by psyc 5y agoAll but gmail. That was created in house by Paul Buchheit.oblio 5y agoAh, I thought it was based on an acqui-hire of Oddpost: https://en.wikipedia.org/wiki/Oddpost https://en.wikipedia.org/wiki/Oddpostjannes 5y agoThe Wikipedia article says that it was acquired by Yahoo and turned into Yahoo Mail. You may have confused Google with Yahoo?