Mail problem

Since an image is worth a thousand words, here is a screenshot of my Mail sidebar.

I have four e-mail accounts: two are POP, the other is iCloud, and a third is IMAP.

As you can see: there are the "All Inboxes" (where ALL accounts appear, POP or not); I closed it for privacy.

There "All Drafts" and "All Sent" (again, if I were to open the disclosure triangle, in both cases I would have boxes for each account, including the POP ones).

There is "On My Mac". This is where I have created all my mailbox hierarchy and have thousands of e-mails in dozens of mailboxes, stored, as the name says, on my mac - not synced to any server.

And there are boxes for iCloud and for my IMAP account.

All correct, all as it should be.

Greetings iefeoglu!

Looks like you are having some trouble with showing a specific mailbox in Mail on your Mac. We can absolutely help get that issue resolved! Make sure you have that sidebar configured correctly by following the steps listed here: Use the sidebar in Mail on Mac.

Have a great rest of your day!

Where are you expecting to see the POP account?

POP accounts do not appear individually like IMAP, iCloud or Exchange accounts do.

The inbox will appear (e.g if you twirl it open you will see an Inbox for each account, including POP accounts), but there are no other mailboxes associated to a POP account. POP works by downloading messages to your computer. Any mailboxes you then create will appear under "On My Mac".

Because it is never the case for a POP account.

As I tried to explain, a POP account does not have other mailboxes. Once mail is dowloaded it is no longer associated to the account, any mailboxes you create go under "On My Mac".

That is the nature of POP.

IMAP (including iCloud), and Exchange accounts synchronize client and server. Mailboxes you create for an IMAP account, either in a mail client or a web interface are stored on the server, and synchronize with any other device (e.g. your mac and your iPhone will see the same boxes and messages).

POP does not work like this. If you download a message to your mac, your iPhone does not it, and may not even ever see that message, as it may (depending on settings) be automatically deleted. And you can't create and sync mailboxes on a POP server, because the concept does not even make sense for POP.