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Their webmail works fine, and when this account is added to the Windows Mail app, everything works perfectly. These are the common reasons why the IMAP folder is not syncing. To resolve the IMAP issue, I will explain different solutions in the upcoming section of the article. It's just a little bit technical, but we have an IMAP proxy that chooses from some different backend IMAP servers. If the user account ends up on an old IMAP server implementation (in that case f.i. a Cyrus imapd 2.4.17), IMAP Client of iOS 18 Mail app doesn't work. If the proxy directs requests to a newer IMAP server implementation (f.i Cyrus imapd 3.6.1), the iOS 18 Mail app works as expected, even the requests are handled by the same IMAP server proxy.

Why IMAP Folder is Not Properly Syncing?

Look at the mail server settings boxes for password and port settings they’re the ones you need to delete and reapply. I will try the safe starts and experiment with the buttons ans see if it improves. I am using TB for just three weeks now and I have issues daily when sending reset cached Exchange mode mail with no attachments the outgoing mail server will time out. Since the sync issue is universal it appears to be a global issue.

Chosen Solution

Suspect some Apple Dev's have been lazy with some code fix MFA prompts not working in IOS18's mail.app and its causing the issue. I was a little hesitant but went ahead and let it completely remove all the synced items from the account off of my iPhone. After a minute, it was removed so just went and re-added it and BOOM. Decided to just try completely removing my Gmail account, the one that wasn’t syncing with the Mail App after the iOS 18 update.

IMAP folder sync issue in the new Outlook (moved emails not syncing to webmail)

Microsoft Outlook is terrible in IMAP. Hence most people only use MAPI with it. If you are forced to use IMAP, I would recommend switching to an alternative E-Mail client like Thunderbird Thunderbird — Free Your Inbox.

Meanwhile, the "connecting" or "Checking for mail..." just stays on the bottom status bar of the mail app.I will try the safe starts and experiment with the buttons ans see if it improves.I have no firewall monitors running during the day that would interfere just the vpn.After instalation ios 18 all my accounts in mail app stopped to sync( including icloud mail).It's usually not checked by default for IMAP to minimize network traffic.

My accounts in Mail app stopped to sync post update

Simply making a change in Outlook does not in and of itself mean that anything has changed in Gmail. For example, you can disconnect from the Internet and make changes. Outlook needs to explicitly reach out to Gmail and communicate flush DNS and Re-sync Outlook the changes you've made. I would suggest that frequent changes to folder contents on multiple devices will make it go wrong. Stack Exchange network consists of 183 Q&amp