At selecting an email address at writing new e-mail emClient duplicate, much more than duplicates contacts.
Example: I have save only one concat tomas.kubin@… in all my contacts. But when I write a new email I see this e-mail adress several times and finally this contact have several variants
You can delete Recipients history under Settings >> Mail >> Compose.
You can also uncheck “Store composed mail recipients for suggestions”.
Flushing recepients history do absolutely nothing… After it I see empty list… at new e-mail I see still absolutely the same list as before
This issue has been discussed for 1 month on forum. Everybody knows what’s the matter. Look at these topics…