Mail: email retrieval from 2 different servers

Question

I retrieve emails to MAIL for my 2 email addresses from 2 different servers (gmail and 'workspace'). I try to keep the email on the servers to a minimum by deleting emails, but I want all the emails to stay in "Mail" on my Macbook pro.  When I delete email on the gmail server and then 'check mail' in Mail, if it's not on the gmail server, it gets deleted in Mail.  Under 'preferences:accounts:advanced' I've selected 'all messages and their attachments' under 'keep messages for offline viewing'.  I thought this would preserve all emails in Mail, but it doesn't.  What should I do to make sure all the emails I want to stay in Mail, stay there regardless of whether they are still on the servers or not?  Thanks.

Answer 1

try, like this
SQL> select name from v$database;
NAME
DBDEMO
SQL> create user testing identified by passwd;
User created.
SQL> grant connect,resource to testing;
Grant succeeded.
SQL> conn testing/passwd;
Connected.
SQL> create table test_tb (id number);
Table created.
SQL> insert into test_tb values(123);
1 row created.
SQL> /
1 row created.
SQL> commit;
Commit complete.
SQL> select count(*) from test_tb;
  COUNT(*)
         2
SQL>
on dblink created machine:-
SQL> select name from v$database;
NAME
DB2
SQL> create user nic identified by nic;
User created.
SQL> grant connect,resource, create database link to nic;
Grant succeeded.
SQL> conn nic/nic;
Connected.
SQL> create database link test_db_link connect to testing identified by passwd using '(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.1)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = dbdemo)))
  2  ';
Database link created.
SQL> select count(*) from test_tb@test_db_link;
  COUNT(*)
         2
SQL>