If emails are arriving on your phone but not your computer, the email account itself may still be working. The difference between the two devices usually points to a sync, account setup or email app problem rather than a complete failure of the mailbox.
The same applies in reverse. If email appears on the computer but not the phone, the missing messages may be caused by the phone’s account settings, authentication, background syncing or folder configuration.
The fastest way to separate an account-level problem from a device problem is to check the mailbox through webmail.
Use webmail as the control test
Webmail is the version of your mailbox opened directly through a web browser. Depending on the provider, this may be Gmail, Outlook on the web, BigPond webmail, iCloud Mail or a webmail portal supplied by an internet or website hosting company.
Because webmail connects directly to the mailbox, it provides a useful control test. It shows whether the message has actually reached the email account before Outlook, Apple Mail, a phone app or another program becomes involved.
- If the message appears in webmail and on the phone but not the computer: the computer or its email program is the likely problem.
- If the message appears in webmail and on the computer but not the phone: the phone app or phone account settings are the likely problem.
- If the message is missing from webmail as well: the issue is probably with the mailbox, filtering, storage, forwarding, sender or email provider.
- If different devices show different folders or older messages: the account may be configured differently on each device.
It is also useful to send a new test message from another email address while webmail and both devices are open. This makes it easier to see exactly where the message appears and where it stops.
Why email can appear on one device but not another
An email address and an email app are not the same thing. The mailbox normally lives on a remote server. Each phone, tablet or computer then connects to that mailbox and downloads or synchronises its own view of the messages.
One device may continue working while another has an expired password, a disconnected account, an incorrect server setting or a damaged local profile. The working device can make the problem confusing because it proves that some part of the setup is operating, but not necessarily that every device is configured correctly.
Common causes include:
- Different account: one device is signed into another email address or alias.
- Expired sign-in: the password or authentication token has expired on only one device.
- Sync failure: the email app is offline, paused or failing to complete a send and receive cycle.
- Folder settings: only selected folders are being synchronised.
- Hidden messages: a rule, filter or mailbox view is hiding the message on one device.
- Different account types: one device uses IMAP or Exchange while another uses an older POP configuration.
- Damaged app data: the Outlook profile, Apple Mail account or phone app data has become corrupted.
Check that both devices are using the same account
This sounds obvious, but it is common for people to have several similar email addresses configured across their devices. A phone may be showing a Gmail account while the computer is displaying an internet provider account, Microsoft account, work mailbox or an old address that is no longer used.
Unified inboxes can make this even harder to see. A phone may combine several accounts into one All Inboxes view, while Outlook or Apple Mail on the computer displays each account separately.
Compare the full email address shown in the account settings on both devices. Do not rely only on the display name, because several accounts may all be labelled with a name such as Personal, Work or Email.
Also check whether the missing message was sent to an alias, shared mailbox or secondary address that is only configured on one device.
IMAP, POP and Exchange do not behave the same way
The account type affects whether messages, folders and read status are expected to match across devices.
IMAP keeps messages on the mail server and normally synchronises folders across phones and computers. Microsoft Exchange and Microsoft 365 accounts also synchronise email and may include calendars, contacts and shared mailboxes.
POP is an older method that primarily downloads messages to one device. Depending on its settings, a POP email program may remove messages from the server after downloading them. This can cause email to appear on the first device that checks the mailbox but not on another device later.
A mixed setup, such as POP on an old computer and IMAP on a phone, can produce inconsistent inboxes even though both devices use the same email address.
Changing an account from POP to IMAP should be done carefully. Existing messages may be stored only inside the computer, and deleting the old account before checking its local folders can make those messages difficult to recover.
When email is missing from the computer
If webmail and the phone both contain the message, concentrate on the computer and its email program.
In Outlook, the account may be disconnected, working offline, waiting for a password or using a damaged profile. A rule may have moved the message into another folder, or the mailbox view may be filtering out unread, older or categorised messages.
Cached Microsoft 365 and Exchange accounts can also stop updating even though Outlook still opens normally and displays older email. The local copy of the mailbox may be stuck while the server copy continues receiving new messages.
Other computer-side causes include an incorrect incoming server, expired credentials, security software interfering with the connection, a full local data file or an email program that has stopped completing automatic synchronisation.
For Outlook-specific checks, see Outlook not receiving emails.
When email is missing from the phone
If the message is visible in webmail and on the computer, check the email account on the phone.
The phone may have stopped synchronising after a password change, security prompt or provider update. Some accounts remain visible in the mail app but silently stop downloading new messages until the user signs in again.
Check whether the phone is displaying the correct inbox, whether the account is enabled for mail and whether new messages appear after manually refreshing the mailbox.
Other common phone-side causes include:
- Fetch or Push settings: automatic mail fetching is disabled or set to update infrequently.
- Password required: the phone is waiting for the email password to be entered again.
- Limited sync: only recent messages or selected folders are configured to synchronise.
- Background restrictions: battery or data settings are preventing regular updates.
- Provider security: the account requires an app-specific password or newer sign-in method.
- Wrong app: the account has been added to one mail app while a different app is being checked.
For Gmail-specific causes, see Gmail not receiving emails. For iPhone, iPad and Mac problems, see iPhone or Mac not receiving emails.
Check folders, filters and mailbox views
The message may have arrived without appearing in the inbox currently being viewed.
Check Spam, Junk, Trash, Archive, All Mail, Other, Focused Inbox and any custom folders. Outlook rules, Gmail filters and server-side filtering can move messages before a phone or computer displays them.
A local search can also be misleading. One device may search the entire server mailbox while another searches only messages that have already been downloaded.
If the problem affects messages from only one person or company, check blocked senders, junk settings, filters and conversation grouping. A message may also have been added to an existing conversation rather than appearing as a separate new item.
Do not delete the account before checking access
Removing and re-adding an email account can fix some sync problems, but it should not always be the first step.
Before removing anything, confirm that the correct password works in webmail and that any required verification phone number, recovery address or app-specific password is available.
Also check whether the computer contains local folders, archived messages or a POP mailbox that does not exist on the server. Deleting the account or Outlook profile without checking this first can remove the easiest path to those messages.
Avoid repeatedly changing the password across multiple devices unless there is a clear reason. Each password change can disconnect other phones, tablets, computers, printers and scanning devices that use the same account.
A practical troubleshooting sequence
The following sequence helps isolate the fault without making unnecessary changes:
- Check webmail: confirm whether the missing message is present on the server.
- Send a test: use a separate email address to send a fresh message.
- Compare addresses: confirm the complete email address configured on each device.
- Refresh both devices: look for password or connection warnings.
- Check other folders: inspect Spam, Junk, Archive, All Mail, Focused Inbox, Other and custom folders.
- Identify the account type: check whether each device uses IMAP, POP, Exchange or Microsoft 365.
- Review mail handling: check rules, filters, forwarding and folder synchronisation settings.
- Protect local email: only remove or rebuild the account after confirming the password and protecting locally stored messages.
When the problem is bigger than one device
If the missing message is not visible in webmail, the device is probably not the main cause. The mailbox may be full, the message may have been filtered, forwarding may be redirecting it, or the email provider may not have accepted it.
Business and domain email can also be affected by server settings, mailbox routing or Domain Name System records. In those cases, changing settings repeatedly on the phone or computer will not correct the underlying problem.
The broader email receiving troubleshooting service explains the account, storage, filtering, server and domain problems that can stop mail before it reaches any device.
Need help with email not syncing across devices?
If emails arrive in one place but not another, PcRiot can check the mailbox, webmail, sync settings, Outlook profile, Apple Mail setup, phone app and account configuration.
PcRiot provides onsite email troubleshooting across Perth and can test the complete setup without assuming that the phone, computer or email provider is automatically at fault.