G Suite from non-Gmail app

Three methods of connecting to an email server in general, from fast to slow include:

  1. Microsoft Exchange ActiveSync (EAS)
  2. IMAP
  3. POP3

Gmail EAS requires a paid G Suite subscription. Google Sync acts as an Exchange server, allowing remote management including remote wipe, app blocking, password policies and more for mobile devices.

Exchange Activesync: G Suite

Many corporations using G Suite choose to use Google Sync & Exchange ActiveSync with their non-Android mobile devices:

When clicking the Trash can icon or clicking Delete on a Gmail account connected via Exchange ActiveSync / Google Sync, the email message is either:

  • Archived in All Mail
  • put into Trash immediately

depending on corporate policies enacted through the Google Admin Console.  Corporate retention policies setup in G Suite may delete any email older than a certain age despite this of course.

POP3

Most people do not use POP3 anymore, since it is more like a one-way connection to the email server, and can be very slow to update with new messages (many minutes). For those that use POP3, there is an option accessed via the standard user Gmail website: Settings > POP/IMAP Download that allows selecting what happens when a message is accessed via POP.

IMAP

This is a common connection method for those using non-web, non-Android email connections to Gmail. If you don’t actually have IMAP enabled in Gmail Settings, you can run into perhaps unwanted behavior. This method is typically preferred for personal accounts over POP3 because the connection is bidirectional and many servers allow Push notifications. Push alerts the user to new messages in seconds instead of the 5-15 minute delay in receiving email notifications associated with POP3.

Exchange ActiveSync (EAS) is much faster than IMAP typically, and the ability of EAS to enforce corporate policy on mobile devices leads many corporations and organizations to use EAS.