When a message you can see on your laptop never appears on your mobile, or sent emails sit in the Outbox for hours, the disruption adds up quickly. Knowing how to fix email sync can save a lot of frustration, especially when you rely on email for appointments, invoices, school notices or customer enquiries.
Email sync problems are usually fixable without replacing a device. The key is to work from the simplest cause to the more involved ones, and to avoid deleting an account before you know whether important messages are stored only on that device.
Start by identifying the email sync problem
“Email is not syncing” can mean several different things. New messages may not arrive, sent mail may not leave the Outbox, folders may look different across devices, or contacts and calendars may stop updating alongside email. The fix depends on which of these is happening.
First, check whether the same email account works in its webmail page using a browser. If a new message appears in webmail but not in the Mail app or Outlook, the email service is working and the problem is likely with that device or app. If it does not appear in webmail either, the issue may be with the sender, mailbox storage, account access or the email provider.
It also helps to note whether the problem affects one device or all of them. A mobile-only issue points towards the mobile app, sync settings or mobile connection. If every device has stopped receiving mail, look at the account itself before changing individual devices.
Check the quick fixes first
A surprising number of sync faults come down to connection settings that changed quietly in the background. Before adjusting server details or removing accounts, try these checks.
- Confirm the device has a working internet connection by opening a normal website.
- Turn off flight mode, then turn it back on briefly and reconnect to Wi-Fi or mobile data.
- Restart the mobile, tablet or computer. This can clear a stalled background process.
- Check whether the email app has an update waiting, then install it if one is available.
- Make sure the device has enough free storage. A nearly full phone can struggle to download new mail and attachments.
On mobiles, check that battery saver or low-power mode is not restricting background activity. Android devices may also have a per-app battery setting that puts email apps to sleep. On iPhone, background refresh settings and low-power mode can affect how promptly some accounts update.
If messages arrive after you open the app but not before, this is a useful clue. The account may be set to fetch mail at intervals rather than use push notifications, or the app may be prevented from running in the background.
How to fix email sync settings on your mobile
Open the account settings in your preferred email app and make sure syncing is enabled. The wording differs between devices, but look for options such as “Sync email”, “Mail days to sync”, “Fetch new data”, “Account sync” or “Background app refresh”.
For accounts used for work, check whether your organisation has a device management or security policy. Some Microsoft 365, Exchange and Google Workspace accounts require a screen lock, up-to-date operating system or approved app before they will sync. In that case, changing ordinary mail settings will not solve the issue.
Pay attention to the sync period. A setting such as “last 30 days” does not mean older emails are gone. It normally means the app has chosen not to download them to the device. You can often find older mail through search, webmail or by increasing the sync period.
If you use an email app supplied by your provider, such as Outlook or Gmail, try opening the account in the provider’s app as a test. This can help separate an account fault from an issue with the built-in mail app. It is not always necessary to keep the second app, but it can make diagnosis much clearer.
Check your password and account security
An expired password is one of the most common reasons email stops syncing. You may still be able to read old mail in an app, which makes it seem like the account is fine, but the app can no longer connect to download or send anything new.
Try signing in through webmail. If you are asked to verify your identity, accept updated terms, change a password or approve a security prompt, complete that process first. Then return to the email app and enter the new password when prompted.
Accounts protected by two-step verification need a little extra care. Some older email programs cannot use a standard password after two-step verification is enabled. They may require an app password, while newer apps usually use a secure sign-in window instead. Do not keep retrying a password if the provider has temporarily blocked sign-in attempts. Confirm the account can be accessed through webmail, then update the app correctly.
Also check the security activity for unfamiliar login warnings. If you suspect the account has been accessed by someone else, change the password through the provider’s official account page, sign out of unknown sessions and review any forwarding rules. Unauthorised forwarding can make messages appear to vanish from the Inbox.
Review mailbox space, folders and sending limits
Email accounts have storage limits. When the mailbox is full, new mail may bounce back to senders or stop appearing until space is cleared. Check webmail storage, including large attachments, Deleted Items, Junk and Sent folders. Emptying the rubbish folder is often necessary before space is actually released.
A missing email may also be somewhere unexpected. Review All Mail, Archive, Junk, Deleted Items and any custom folders. Filters and rules can automatically move messages, particularly after an email account has been migrated or a new device has been set up.
For outgoing mail, inspect the Outbox. A message with a large attachment can hold up every email behind it. Remove the attachment, reduce its size or send it another way, then try again. Some providers also limit the number of messages that can be sent in a short period, which can affect small businesses sending newsletters or invoices in bulk.
When server settings are the cause
If you have a custom domain email address, such as name@yourbusiness.co.nz, and use a manual setup, incorrect incoming or outgoing server settings may be the cause. This is especially likely after changing internet providers, moving website hosting, changing passwords or setting up a replacement computer.
Most modern accounts use IMAP, Microsoft Exchange or a provider-managed connection. IMAP keeps mail on the server and synchronises folders across devices, which is generally the best choice when you check mail from more than one place. POP is older and may download messages onto one device without keeping folders in step. It can still be appropriate in a few situations, but it needs careful setup.
Check the account type, incoming server, outgoing server, port numbers, encryption method and authentication requirements against the details supplied by your email provider. Do not guess these settings. One incorrect character in a server name or username is enough to stop sending and receiving.
Remove and re-add the account only when it is safe
Removing and adding an account again can fix corrupted app settings, but it should not be the first step. For IMAP, Exchange, Microsoft 365, Outlook.com, Gmail and iCloud accounts, messages are usually stored on the server and will reappear after the account is added again.
The trade-off is that it can take time to re-download mail, calendars and contacts. You may also need to re-enter passwords, approve two-step verification and recreate any settings stored only in the app.
Be more cautious with POP accounts, older computer mail programs and addresses set up years ago. Some messages may exist only on the device, particularly in local folders or archives. Back up the mail data before removing anything. If you are unsure which account type you have, it is safer to get help than risk losing business records or personal correspondence.
Keep email syncing reliably after the fix
Once email is working again, keep the app and device operating system updated and make sure recovery details for the account are current. Use a password manager if you have trouble keeping track of account passwords, and avoid sharing the same password across services.
For a small business, it is worth documenting where the domain, email hosting and account recovery information are held. That small bit of housekeeping can prevent a simple password reset or device change from becoming a day of lost access.
If email still will not sync after these checks, or you are concerned about messages stored locally, a technician can investigate the account without taking risks with your data. Tech Experts can provide remote or on-site support for homes and small businesses across Wellington, Hutt Valley and Porirua, helping get your email working where you need it. The sooner the cause is checked, the sooner your inbox can get back to being useful rather than another job on the list.