HTTPS vs HTTP
In order to improve the security of the Gmail system, Google HTTPS has been introduced as the default method for reading emails in your browser through Gmail.
This is to prevent theft of personal data – when information is sent via the standard HTTP protocol (which you will recognize as part of the address of every website you visit) it isn’t encrypted. Using HTTPS is a secure method of transferring data across the HTTP protocol, which is different to the standard email protocols like POP and IMAP, which are found in email clients.
If using HTTPS has slowed your connection to Gmail, you might want to try disabling it.
First of all, sign in to your Gmail account.
Via the Gmail menu across the top of the page, click Settings.
Find the settings for Browser Connection and choose between Don’t use HTTPS or Always use HTTPS, and Save Changes when you are happy with this.
Finally, you will need to alter the URL in your address bar to http://mail.google.com.