When a message appears on your phone but not your computer—or the reverse—it is tempting to remove the account and set it up again. Pause before doing that: some fixes can erase local-only mail or make it harder to tell what went wrong. First compare the exact mailbox address, search scope, folders and connection state on both devices. Then use a small, reversible test to see whether new mail arrives consistently. This sequence helps narrow the problem while preserving the messages and settings you already have.
The useful bits
- Confirm both devices are showing the same full mailbox address.
- Check search scope, folders and connection state before changing account settings.
- Use a clearly labelled test message and keep local data intact until the cause is clearer.
Start with the mailbox address
Compare the full address shown in the account settings or account switcher on each device. Check every character, including the part after the @ sign. A personal address and a work address can look similar, and an alias may deliver to a mailbox without being a separate mailbox or login. If you are unsure which account is the intended one, confirm it through the account information you control rather than guessing from a display name.
For BITTU Mail, sign-in and account actions go through mail.bittuicloud.com. Avoid entering your credentials into an unfamiliar sign-in page. Do not share a password or one-time code while troubleshooting.
Make sure the message is not outside the search
Searches may be limited to a folder, a date range, or a selected mailbox. Clear any filters and search for a distinctive word from the subject or sender. If the message still does not appear, browse the mailbox folders directly. Check Inbox, Sent, Archive, Spam and Trash where available; the names or available folders can differ by app.
Compare like with like: open the same folder on both devices, then use the same search terms. A search result on one device does not prove the other device is missing mail if its search is restricted to a different folder.
Check whether both devices are connected
Look for an offline indicator, a connection warning, or a refresh that remains in progress. Confirm that the device has a working internet connection, then refresh the mailbox once and allow the app time to update. If other online services are also unavailable, resolve the device’s connection first. If only this mailbox is affected, note the exact warning rather than repeatedly changing settings.
If you use a mail app with a manual account configuration, compare its incoming server details with the published BITTU Mail settings: IMAP at mx1.bittuicloud.com, port 993, using SSL/TLS. For sending, the published options are the same host on port 465 with SSL/TLS or port 587 with STARTTLS, with authentication and the full mailbox address as the username. Do not use port 25 in a mail app or accept a certificate warning. If you are not comfortable checking these fields, do not edit them yet.
Use a second view to narrow the cause
If available, sign in to the mailbox through the official BITTU Mail account route and check the same folder there. If the message is visible in this view but absent from one app, the difference is more likely to involve that device’s search, display, connection or account configuration. If it is absent from both devices, verify the sender used the correct address and ask them to confirm whether the message was sent and whether they received an error.
This comparison narrows the possibilities; it does not establish why a message is missing. A sender’s sent copy alone may not confirm delivery to the mailbox.
Try a small, reversible test
After confirming the address and connection, send a harmless message from an account you control to the mailbox. Give it a distinctive subject, then check the same folder on both devices. Do not use sensitive information. Note which device shows the message first and whether refreshing or reopening the folder changes anything.
For example, send from [sender@example.com] to [mailbox@example.com] with the subject [Sync check – Tuesday]. If it appears in the mailbox’s web view and on one device but not the other, preserve that observation before making a change. Delete the test only after you have finished comparing views; if deletion might sync across devices, leave it in place temporarily.
Change one thing at a time—and protect local mail
Record the current settings or take a private screenshot before editing them. If a specific connection field is clearly incorrect, change only that field, save it, and repeat the same test. Check that the message appears in the same folder on both devices before deciding the issue is resolved. If the result gets worse, restore the recorded value.
Do not remove the account, clear app data, reinstall the app, or delete local message files as an early step. Some apps keep messages or drafts only on the device, and the effect of removing an account depends on the app and its settings. If local-only items matter, first find out how that app stores them and how to preserve them. Stop if you see a certificate warning or cannot identify a setting confidently.
A useful note for follow-up is brief: [full mailbox address checked], [folder and search used], [which device shows the test], [connection warning, if any], and [one change tried]. It gives you a clear next step without risking more data.
About this guide
Prepared with AI assistance for the BITTU Mail editorial library. Check important details against your original messages and current account settings. Product access depends on your role, plan and provisioning state. Provider interfaces and requirements can change.
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