Sent mail from iPhone doesn't show up on Mac desktop mail client (and vice-versa)

Thanks so much for the help. My problem now is I follow your instructions Mail Preferences > Accounts > Advanced. Once I hit advanced I hit a wall - in both mail on my macbook pro and on my iphone. Where should I alter these settings to have it always copy me, inside Mail or inside my phone? (Or neither, inside my actual gmail account?). Once inside mail, and advanced, here is what I see (attached) as my options:

The Advanced tab is just for how long to leave messages on the server. The iPhone should have defaulted to never, but it is under Advanced in the Mail, contacts, Calendars settings for that email account.

To set up CC'ing yourself, it is in the Composing pane of Mail's preferences, and on the iPhone it is in the Mail, Contacts, Calendars settings, Main page in the Mail section: Always Bcc myself.

The Bcc means they don't see that you are cc'ing yourself. You can also set that in Mail if you want.

Thanks so much, you have been SUPER HELPFUL!

My problem was any Yahoo mail sent from my iphone only appeared in the sent folder on my phone and any mail sent via yahoo on my mac only appeared on my yahoo desktop sent folder, I did the following as per above, but then an addition to this too:

Mail > Preferences > Accounts > Mailbox Behaviors > Store sent messages on the server: check

But it still didn't work, so I scrolled down the folders to store on the server and found another folder called "Sent" check this AS WELL AS "Sent messages"

It now all syncs on both devices.

Mail > Preferences > Accounts > Mailbox Behaviors > Store "sent messages" on the server: check

Mail > Preferences > Accounts > Mailbox Behaviors > Store "sent" on the server: check

Mail > Preferences > Accounts > Mailbox Behaviors > Store sent messages on the server: check

Sorry I am not seeing the option "Store sent messages on the server". I am only seeing this (see screenshot). Having same problem as the person who submitted this post! Thanks...

You might want to consider starting a new discussion. Since this one is a couple of years old, less people are likely to look at it. A new post would be much more visible. You can link to this one.

Not the cleanest solution, but set up your iPhone mail settings to "Always bcc" yourself. Then set up a Rule in Mail on your Mac to catch any incoming mail from you with a bcc to you and move it to the Sent mailbox. I don't see a way to move it in the opposite direction, but that wasn't my concern.

Great step-by-step reply and to the point! Thanx