Problems with IMAP4 and POP3 in Exchange 2010

We set up a new Exchange 2010 server (yes, in 2016) and soon discovered that IMAP and POP weren't working.

I checked the following:

• Get-ImapSettings
• Get-PopSettings

And both reported that everything was fine. Checking in the Exchange Management Console the banner string says "The Microsoft Exchange IMAP4 (or POP3) service is ready." Note, that's not a status, that's a thing which is displayed when clients connect. But all the settings look fine there too.

What else is there to check? Services. On my Exchange 2010 server I had to set both of these services:

• Microsoft Exchange IMAP4
• Microsoft Exchange POP3

To automatic and then start them. I'm not sure why they aren't set that way to begin with.