How to synchronize Outlook sent emails to the server automatically?

That's not about the server, it's about which folder Outlook is configured to store emails in.

 

I understand what you mean, and as I mentioned, this is not server-related. The email clients decide on their own in which Imap folder they want to store certain emails, and when the email clients do not agree to use the same folders (when using different clients), then one client will not see the emails stored by another client. So basically you will have to use the same settings in all mail clients for the folder names where certain emails get stored. ISPConfig creates default folders which most clients use like .Sent and .Drafts, but if Outlook tries to store emails in other folders, e.g., because it creates folders in your local language, then this will cause the issue you described. So you either have to configure Outlook to use the standard folders or configure RoundCube to use the Outlook folders.

 

https://support.microsoft.com/en-us...e > Options > Mail.,the same folder check box.


You can also try to configure special users folders in dovecot.conf, maybe this can enforce in Outlook to use the right folders. Something like:

Code:

mail_plugins = $mail_plugins special_use
plugin {
  special_use = \Drafts=Drafts \Sent=Sent \Trash=Trash \Junk=Junk
}

 

First, emails can only be stored remotely when using IMAP, POP3 does not support it. And when using IMAP, it applies what I posted above. An IMAP server is - when viewed from the perspective of a mail client - just like a hard disk where you can create any kind of folder you like. When you want several mail clients to show the same sent emails, they must store them in the same folder using IMAP. The mail clients must agree to use the same folder name. Otherwise, one client stores sent mails in folder a and the other mail client in folder b, so none of them would see the sent emails of the other client. That#s why email clients must be configured to use the same folder name if you want sent emails to show up in all of them.

 

Then this can't work. POP3 protocol can not sync sent emails. You must use IMAP.

 

This might work when you have multiple email accounts configured with one account connected with IMAP and provides a shared sent folder to the pop3 accounts as well. Or, the mail clients must use a different shared write media, such as a network drive. But pure pop3 accounts simply can't do that; the pop3 protocol does not allow the mail client to store email on the server, and having a shared sent folder is nothing else than storing emails on shared writable file storage media like a server.

 

Not really. Your case is very specially constructed where the webmail client and desktop client must, e.g., be from the same vendor that has implemented another write channel for storing mails not using email protocols. Of course, such a setup is possible if the same vendor controls web and desktop clients (e.g. Microsoft Outlook) to implement his proprietary write protocol. But he can't do that with pop3 only and that#s what this thread here is about as I doubt the thread starter wanted to write his own desktop and web client to achieve this.

 

IMAP is made for this exact purpose and built into all common email clients. So why don't you use IMAP?