Connecting apps and devices
Server names, ports and encryption for IMAP and SMTP, the webmail, and what to check when a login is refused.
Connection settings
| Incoming (IMAP) | Outgoing (SMTP) | |
|---|---|---|
| Server | imap.webmail.quathos.com | send.webmail.quathos.com |
| Port | 993 | 465 |
| Encryption | SSL/TLS | SSL/TLS |
| Username | The full address (you@yourcompany.com) | The full address |
| Password | The one set when the mailbox was created | The same |
Both ports use implicit TLS: encryption starts before anything else is sent. Set the security to SSL/TLS, not STARTTLS. A client that opens a TLS handshake against the wrong mode reports a confusing version error.
The username is always the complete address. A local part alone ("john") is not enough, because the same one can exist on more than one domain.
Webmail
Every mailbox can be read at mail.webmail.quathos.com, with nothing to install. From the panel, opening a mailbox is one click, with no second login.
It is the fastest way to confirm a mailbox works. If the webmail signs in and a desktop client does not, the problem is in the client settings, not the mailbox.
Mail apps
- Thunderbird: choose manual configuration and enter the values above; automatic detection may pick STARTTLS.
- Outlook: add an IMAP account and set both ports and encryption by hand.
- iPhone and Android: add "Other" account, then IMAP; the address is the username on both screens.
When a login is refused
The server answers the same way to a wrong password and to a mailbox that is not enabled, so check the state before changing anything.
- Is the mailbox active?. A mailbox created before the subscription starts exists but cannot sign in. The panel shows the state; a pending mailbox says so.
- Is the domain still verified?. If DNS changed and the domain failed its recheck, mailboxes are suspended until it passes again.
- Is the username the full address?. This is the most frequent cause after the two above.
- Still refused?. Reset the password in the panel. The password is never stored in readable form, so nobody, including us, can tell you what it was.