Any help or advise will be greatly appreciated. My Gmail or my Yahoo email accounts on my Apple Mail app are working fine and so I'm not sure what's going on. I tried the Rebuild function but that didn't work either. I tried disabling my iCloud account and re-enabled it, it didn't work. (took 9 ms)' but still the email will reappear on my Inbox.Īnother strange behavior is when I try to move some of my email to a folder I created under my iCloud email account, I get this popup error message saying 'The IMAP command “APPEND” (to folder) failed with server error: Server Busy. Email Backup software copies all emails from one account to another IMAP account using email backup migration technology for Mac OS & Windows OS. IMAP (Internet Message Access Protocol) is a protocol that requests that your email provider will save all of your messages and folders onto its own servers. The server returned the error: Server Busy. The software provides a direct option to migrate any email account mailbox to IMAP Server by filling in the IMAP account credentials like port no, and account login details with Email backup optimization. The short answer is that IMAP connects to your email providers server and is used for receiving email while SMTP is used for sending mail to other servers. Mail was unable to open this mailbox on the server “.com”. First, when I delete my iCloud emails, it will reappear in my Inbox after a few seconds and when I try to delete it again, this time, it will try to go back to the Inbox again but this time I'll get a popup error message saying 'The message could not be moved to the mailbox “iCloud”. Lately, I've been getting strange behaviors on my iCloud emails in the Apple Mail app when running in both my 2018 Mac Mini or my 2020 MacBook Air.

Icloud imap server