Removing Duplicates

I have a members table and have added an extra few thoushand members to it. Now I need to remove the duplicates.

It doesnt matter which duplicate i remove as long as there are unique email addresses.

so here is the format of the table:

id
email
firstname
lastname
datebirth

if i do a:

SELECT COUNT(DISTINCT Email) AS Expr1
FROM Customer

it returns 21345

and

SELECT Count(Email)
FROM Customer

returns 28987

I can get the unique email addresses into another table by going:

SELECT DISTINCT emailaddress INTO DistinctCustomer
FROM Customer

but this will only return unique email addresses. How do i select distinct email address and all other fields into a new table? or just remove duplicates where email address appears more then once?

Thanks in advance

Tom the SQL beginner