Gmail – How to forward the old ISP “Sent” folder emails to a new Gmail account

You do not need both. I suggest using mail forwarding because you will receive mail from your old account more quickly than using the POP3 method. Forwarded mail seems to be sent nearly instantly, while POP depends on the new account to poll from the old account. GMail varies the polling frequency based on how often the polled account gets mail. The delay could be as long as an hour. I don't think POP3 will ever be as fast as forwarding.

POP3 forwarding has one advantage: it logs into your old account and keeps it alive. This does not apply for GMail, but some email accounts are closed if inactive. My .edu university account is closed if it is not accessed for a certain period of time. In this case it may make sense to enable both: to get undelayed forwards and keep your account active.

I had this problem before and took me days to figure out.

It is related to your server setting, not Google Apps. I assume your server is running cPanel.

1. log in cPanel account of the account (domain)
2. Click "MX Entry" under "Mail"
3. Select your domain from the drop down list
4. Select "Remote Mail Exchanger" under "Email Routing"
5. Click "Change" button and you are done.

If you do not set email routing to "remote mail exchanger", the email will be delivered locally when sent from the server, thus you don't get the emails in Google Apps (external mail server).

Hope this helps.