Recently, I changed to a shorter mail address(from Google Apps, to Google Apps, just for an address). As I have Google Apps standard version, I have to use 3rd party tools to migrate my two mailboxes.
However, I have a slow connection to imap.gmail.com, and I cannot get some of my mails with big attachments migrated, because before the FETCH command finishes, the server would disconnect me.
I've searched about this, and found that if a client didn't SEND and commands to server within a time limit, the server will make this connection timeout. But actually I'm receiving data, and the tool would not send any commands.
Since my connection cannot finish the transfer in time, I can't get those mails migrated. To accelerate the connection, I tried to use several VPNs, but when I connect, I always get "connect timeout" message. Seems that the connection cannot be established.
How to get it worked? Why can't I connect to Google's IMAP server through VPN?
(Google's IMAP uses SSL on 993 port)