Docs · Mail apps

Connect a mail app (IMAP/SMTP)

Every SuperMailOS mailbox works in the built-in webmail and in any app that speaks standard IMAP and SMTP — Apple Mail, Outlook, Thunderbird, the iOS and Android mail apps, and everything in between. IMAP and SMTP are included on every plan.

Your settings

Use these in your mail app’s manual setup:

Both servers use the same host, mail.supermailos.com. Connections are always encrypted: IMAP on 993 and SMTP on 465, both over SSL/TLS. Plain, unencrypted ports are not offered.

Step by step

1. Create an app password. In SuperMailOS, open Settings → Security → App passwords and generate one for the app you’re adding. App passwords keep your main login (and its two-factor code) out of third-party apps.
2. Add an account manually. In your mail app choose Other or IMAP rather than a named provider, so it asks for servers instead of guessing.
3. Incoming server. IMAP, mail.supermailos.com, port 993, SSL/TLS on.
4. Outgoing server. SMTP, mail.supermailos.com, port 465, SSL/TLS on, authentication on.
5. Sign in. Username is your full email address; password is the app password from step 1.

Troubleshooting

• Login rejected. Make sure you’re using the app password, not your account login password, and your full address as the username.
• App insists on STARTTLS or a plain port. Choose SSL/TLS. Only 993 (IMAP) and 465 (SMTP) are served, both encrypted.
• Nothing sends. Confirm the outgoing server has authentication enabled — some apps default it off.

Prefer webmail? Just sign in at SuperMailOS and skip the setup entirely. Next: set up your domain’s DNS or migrate your existing mail.