I am trying to migrate from PostBox to eM Client. The various email accounts seem to have migrated over OK, but none of the PostBox folders and subfolders (there are 100s) migrated. I have been using them for years to file email according to topics and etc. (The emails might have come from different email accounts, but would all be related to a specific topic or subject.
In effect, my email filing system from the past 10 or so years simply does not show up in eM. Am I missing something???
I replied to another message with the same issue —-I had 14 folders for various types/years of email. I had to create those folders in eM Client then manually import to those folders. To import I had to add the .mbox extension to the files. The files in my case are in my user Library/Application Support/PostboxApp/Mail/… You’ll see for example:
Test with no extension and Test.msf. Add.mbox to the file with no extension. Then in import in eM Client choose .mbox import and follow the prompts. All my folders imported perfectly. FYI-With the .mbox extension change all the folders still worked in Postbox.
Thanks! Very helpful. And very labour intensive! 
none of the PostBox folders and subfolders (there are 100s) migrated.
Were these eg: IMAP folders or Local folders ?
Also what version of eM Client do you have ? as there was recent V10 updates for Postbox importing that might fix that issue.
Local folders. And I have v10. But I have uninstalled and am trying again—so far hugely frustrating.
Local folders. And I have v10.
Try the latest version 10.1.4588 via the release history page if you haven’t already got that.
Thanks. Got it. And went through entire install process again. Still did not pick up my folders. And I also got this error message: “Error: 11 unsupported filter(s) failed to import. Dummy filter(s) were created instead.”
I see how to do it–but I have more than a 1000 files that would manually need to have .mbox added… Any thoughts about how to automate that?
I went through entire install process again. Still did not pick up my folders.
I suspect then as the latest eM Client V10 then didn’t import your Postbox folders, the migration process was probably not designed to do that.
So then see if Postbox (like eM Client does) allow you to eg: Create a folder on your desktop and then Drag your local custom message folders from Postbox into that desktop folder. Then just drag the custom message folders back into eM Client Local Folders at the bottom left of the GUI.
Or if Postbox “doesn’t have that drag to desktop folder capability”, then apart from exporting in postbox to .mbox format etc & then importing that into your eM Client Local folders as @dwg advised above he did, would be to “optionally add your account again as an IMAP setup in Postbox if it’s not already” and then drag those custom folders to your IMAP account. Then once all your Local message folders have all synced online, then add your account as IMAP into eM Client.
You can then drag them out of there in eM Client to Local Folders at the bottom left if you wish to. Or you might choose to leave them all in IMAP. If you have the server mail space to accommodate them. I see too @Tony_W also suggested moving those via IMAP also in another thread. I tend to agree with him that’s probably what I’d do too as done myself with many other old mailers in the past for old Local Messages & old POP account folders.
For adding .mbox. Select all the files you want to add the extension to and then right click and choose Rename. Then choose add text and type .mbox and choose after name. Hit rename and all the selected files with have .mbox as extension. You may want to go to finder preferences advanced and turn off Show warning before changing an extension as if left on you’ll be prompted for to accept for every file especially if you have 100’s of files.
OK. This is getting ridiculous. I made all the .mbox extension changes and tried to import to eM. No success. Nothing would show up in eM.
So then I tried something completely different–I exported from PostBox to Thunderbird (installing Thunderbird precisely to try this experiment). And everything exported just fine from PostBox to Thunderbird, including all the email that eM misses.
I then tried to export from Thunderbird to eM. And (I’m no longer surprised), everything imports EXCEPT all the folders and email that eM doesn’t import from PostBox.
For a variety of reasons, I would prefer to not use Thunderbird, but I may have no option. (And I have already paid for an eM account!)
Advice welcome.
Here is a screenshot of what eM fails to import (the red arrow points to the top level folder). Again, I welcome advice.
This is getting ridiculous. I made all the .mbox extension changes and tried to import to eM. No success. Nothing would show up in eM.
I then tried to export from Thunderbird to eM. And (I’m no longer surprised), everything imports EXCEPT all the folders.
As neither the exporting of postbox to .mbox and back to eM Client is working, and exporting to Thunderbird and back to eM Client also didn’t work, I would then suggest as you purchased eM Client which has 12months of VIP support, is to go to the following eM Client support page and login at the top left and lodge a support ticket and an assigned engineer will then assist you.
