I have 2 tables and I would like to find the difference between the 2 tables based on email

Table 1 is a history table and has duplicates for emails address but Table 2 has been de-duped for email ( has no duplicates).

Table 1

```
    Email.           validity.   recency.  last Modified
    aa@gmail.com     1                0-3.    1/21/2020
    ab@gmail.com     0                12-16.   1/22/2020
    aa@gmail.com.     1               NULL     12/20/2019
    aa@gmail.com      1               12-16     11/30/2018
    ga@gmail.com.     1                0-3    1/18/2020

```

Table 2

```
    Email.           validity   recency     last Modified type  partner 
    aa@gmail.com     1                0-3    1/21/2020.    C.    Goo
    ab@gmail.com.    0.               12-16.  1/22/2020.    P.   Azz
    ac@gmail.com     1                0-3    1/18/2020.    P.    Goo

```

Expected Output

```
    Email.           validity.   recency.  last Modified
    ga@gmail.com     1            0-3      1/18/2020

```

I would like to find the list of all emails that are present in Table 1 but not table 2. In my understanding, join can only be used to find a subset/similarity. How can I find differences between the 2 tables? Thanks.