[dba-Tech] Duplicate emails on Gmail's autofill

[Rocky Smolin]

Dear Lists:

One of my pet peeves is writing an email and then entering the To address
using autofill - a very useful feature.

If I have gotten emails from more than one of someone's email address, 50%
of the time I get an email from them telling me I'm not using their
preferred email address.

Problem is, I can't find where in Gmail these duplicate addresses are
stored so I can delete the one the recipient doesn't want me to use.

Does anyone know where they are?

TIA

r