Setting up an email app is easier when you use the provider’s exact server details instead of letting the app guess. For a BITTU Mail mailbox, the incoming and outgoing servers use the same host, but their ports and connection methods differ. This guide gives you the published settings, explains which account details to enter, and walks through a practical check after setup. App labels vary, so use the equivalent fields in your app rather than relying on a particular menu path. If you see a certificate warning, stop instead of bypassing it.
The useful bits
- Use mx1.bittuicloud.com with IMAP port 993 and SSL/TLS.
- Use SMTP port 465 with SSL/TLS or port 587 with STARTTLS; enable authentication.
- Do not accept certificate warnings or use port 25 in a mail app.
Before you open the app
Make sure you can sign in to the mailbox through BITTU Mail’s account service before configuring another app. Sign-in and account actions go through https://mail.bittuicloud.com. You will need the full mailbox address and the credentials associated with that mailbox. If you cannot sign in there, resolve that access issue first rather than repeatedly changing server settings.
BITTU Mail is powered by BITTU ICLOUD, and the published mail host is mx1.bittuicloud.com. Use that host for both incoming IMAP and outgoing SMTP. Do not substitute the public website address or the account sign-in address as a mail server.
Enter the incoming IMAP details
Choose IMAP when the app asks for an incoming account type. Enter mx1.bittuicloud.com as the incoming server, set the port to 993, and select SSL/TLS as the security or encryption method. If the app has a separate authentication option for incoming mail, enable it and use the full mailbox address as the username.
IMAP is the setting the app uses to connect to the mailbox for incoming mail. A field labelled “username” may tempt you to enter only the part before the @ sign; use the complete mailbox address instead. For example, a fictional address would be [name]@example.com.
Incoming mail Account type: IMAP Server: mx1.bittuicloud.com Port: 993 Security: SSL/TLS Username: [full mailbox address]
Configure outgoing SMTP
Outgoing mail uses the same host, mx1.bittuicloud.com. Choose one of the two published combinations: port 465 with SSL/TLS, or port 587 with STARTTLS. These are alternatives; match the port to the security method selected in the app. Do not use port 25 for a mail app.
SMTP authentication is required. Turn on the app’s option to authenticate to the outgoing server, and enter the full mailbox address as the username. Use the credentials for that mailbox. If the app offers to reuse incoming-server credentials, that is appropriate only when those credentials belong to this same mailbox.
Outgoing mail — choose one combination Server: mx1.bittuicloud.com Port: 465; security: SSL/TLS OR Port: 587; security: STARTTLS Authentication: required Username: [full mailbox address]
Treat certificate warnings as a stop sign
If the app reports that it cannot verify the server certificate, do not choose an option such as “continue anyway,” “trust,” or “accept.” Stop the setup and leave the warning unresolved. A certificate warning means the app cannot confirm the connection as expected; accepting it would bypass that check.
Review the host, port, and encryption method against the settings above, then try again. If the warning remains, contact BITTU Mail support through an appropriate official channel before proceeding. Do not enter your credentials into a connection that is still showing a certificate warning.
A short setup check
Once the account is saved without warnings, check both directions rather than assuming that a successful incoming connection also proves outgoing mail is configured. Use a recipient address you control, or another appropriate test recipient, and keep the message simple. Check the app’s sent folder and confirm whether the message arrives. Then check whether a reply appears in the app.
A successful send and reply are practical signs that the app can connect in both directions. They do not guarantee that every future message will be delivered or displayed the same way by every provider.
- Incoming: IMAP, mx1.bittuicloud.com, port 993, SSL/TLS.
- Outgoing: mx1.bittuicloud.com, port 465 with SSL/TLS or port 587 with STARTTLS.
- Authentication enabled; username is the full mailbox address.
- No port 25 and no accepted certificate warning.
- Send a simple test message and confirm that a reply appears.
If the app still cannot connect
Check for small mismatches first: a shortened username, the wrong host, a port paired with the wrong encryption method, or SMTP authentication left off. If those details are correct and the app still reports an error, note the exact message and whether it occurs during incoming setup, outgoing setup, or certificate verification. That distinction helps narrow down what needs attention.
Avoid weakening security settings to make the warning disappear, and do not switch to port 25. If you need help with account access, use https://mail.bittuicloud.com for account actions; for connection problems, seek assistance through BITTU Mail’s official support route. Keep passwords and one-time codes private when asking for help.
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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