Google recently added IMAP support to its Gmail email service, a major boon for iPhone users since it allows changes made by the user to be reflected on the server, won't put both sent messages in ...

Why does this matter? Because IMAP is a two-way e-mail protocol. IMAP client applications can interact with IMAP servers, like Gmail's, so data on both sides stays in sync.

Google is investigating a service outage affecting Gmail users worldwide that causes issues when syncing emails with Microsoft servers via the Internet Message Access Protocol (IMAP).