Apple Mail, commonly known as Mac Mail, is a popular email client among Mac users. It offers you smart features which you don't get in other email clients supported by Mac system. But sometimes it may cause some unexpected issues which lead to serious problems. Generally, the problems occur with error messages. You're likely to receive a Mac Mail error if Apple Mail client finds anything unusual or unfamiliar within the action you perform. One such common Mac Mail error message occurs while moving messages to mailbox "(null)". You'll see the "Apple mail moving messages stuck".
For example, you delete a message and you encounter this Mac Mail error: An error occurred while moving messages to mailbox "(null)". The message gets deleted, but it doesn't go into the trash. Then where does it go? The message is lost forever. So now the question is how to fix this issue. Before knowing how to fix this Mac Mail error message, let's figure out the root cause of this error.
Some of the most common and possible reasons behind this Mac Mail error are as follow:
If you find "Apple Mail moving messages are stuck", you should try this easy method suggested by professionals:
There are few easy manual tricks you can try to resolve this error.
Launch Apple Mail program on your system. Go to the Mail tab > Preferences.
On Preferences, click the Account tab and choose an appropriate email account. Then click Server Settings > Advanced IMAP Settings button.
In the IMAP Path Prefix box, enter INBOX. Click OK.
Now click Mailbox Behaviors, and select the INBOX/Trash.
The account is free from Mac Mail error. Now you can move your messages with ease.
If the above trick doesn't work for you, you should try to rebuild the mailbox. You can do that in this way:
It may take some time to complete this process. The time taken depends on the number of email messages in your Inbox or Sent Items.
Follow these simple steps to assign the folders:
This will assign the Drafts-folder in Apple Mail client.
Note: You need to follow the same procedure for Sent, Junk, and Trash folders.