Use these settings in any standards-compliant desktop, mobile or web email application.
Applies to: SiteWorx hosting mailboxes; not Microsoft 365 or OX App Suite
Important: Use the assigned secure server hostname from the welcome email or Customer Portal. Do not ignore a certificate-name warning or substitute an unverified hostname.
Required settings
| Account type | IMAP is recommended for normal use on one or more devices. |
|---|---|
| Incoming server | The secure server hostname shown in the hosting welcome email or Customer Portal service details. |
| Incoming port | 993 |
| Incoming security | SSL/TLS |
| Outgoing server | Use the same assigned secure server hostname. |
| Outgoing port | 587 with STARTTLS is recommended. 465 with SSL/TLS is the secure alternative. |
| Outgoing authentication | Required; use the same mailbox username and password. |
| Username | The complete email address, for example name@example.org. |
| Password | The password set for that mailbox in SiteWorx. |
| Optional POP3 | 995 with SSL/TLS. POP3 is not recommended where mail must remain synchronised across devices. |
How common field names correspond
| Software may ask for | Enter or select |
|---|---|
| Email address | The complete mailbox address. |
| Username / account name / login name | The complete mailbox address again. |
| Incoming protocol | IMAP. |
| Encryption / connection security | SSL/TLS for IMAP; STARTTLS for SMTP 587. |
| Authentication method | Normal password or password authentication; do not select anonymous access. |
| Outgoing server requires authentication | Yes; use the same mailbox credentials. |
| Root folder / IMAP path prefix | Leave blank unless Support provides a value. |
Test the settings
- Save the account and allow the application to test both incoming and outgoing connections.
- Send a message to an unrelated external mailbox.
- Reply from that external mailbox.
- Confirm sent items and the reply synchronise on any other connected device.
Common problems
| Symptom | Likely cause | What to do |
|---|---|---|
| Incoming mail works but sending fails. | SMTP authentication, port or encryption is wrong. | Use port 587 with STARTTLS, enable authentication and use the complete email address as the username. |
| A certificate warning appears. | The application is using a hostname not covered by the server certificate. | Replace it with the assigned secure server hostname; do not simply accept an unexpected certificate. |
| The application repeatedly asks for a password. | The saved password is old, the username is incomplete or the account is temporarily locked. | Update both incoming and outgoing saved credentials and avoid repeated automated attempts. |
Related articles
- Add a hosting mailbox to a mobile email application
- Add a hosting mailbox to a desktop email application
- Choose IMAP or POP for a hosting mailbox
- Resolve an email certificate or server-name warning
- Test IMAP and SMTP settings separately
- Troubleshoot hosting email sending and delivery
Last reviewed: 2026-07-25.
