Setting up any provider

Last updated October 2026

Any mailbox that offers IMAP for receiving and SMTP for sending works with YouniqMail, even if the provider is not in the selection list. Pick the Setup manually (custom IMAP / SMTP) tile in the wizard and you get every field for free entry.

What you need

Your provider documents these details, usually under keywords like “IMAP settings” or “set up an email program”:

	Incoming (IMAP)	Outgoing (SMTP)
Server	e.g. imap.example.com	e.g. smtp.example.com
Port	993 (common)	465 or 587
Encryption	SSL/TLS	SSL/TLS or STARTTLS
Username	often the email address	usually the same

Port 993 pairs with SSL/TLS from the start of the connection. For outgoing mail, 465 means the same, while 587 starts with STARTTLS. Both are encrypted and safe; it just has to match what the provider specifies.

When you choose the Encryption, YouniqMail fills in the matching standard port itself: 993 and 465 for SSL/TLS, 143 and 587 for STARTTLS. If a port does not match the chosen encryption, YouniqMail points it out. The None (unencrypted) option exists for special cases such as a server on your own network; do not use it over the internet.

Setup

1. Settings → Email Accounts → Add Email Account
2. Pick Setup manually (custom IMAP / SMTP).
3. Enter your name, the address and, under Incoming mail server (IMAP), the server, username and password.
4. Under Outgoing mail server (SMTP), Same credentials as Incoming Server (IMAP) is switched on. As long as the switch is on, outgoing mail uses the server, username and password of the incoming server. If your provider has its own SMTP server such as smtp.example.com, switch it off and enter the values.
5. Test Connection. Both incoming and outgoing are checked.
6. Continue, then Finish.

Check the selection list first

The wizard knows far more providers than you might expect: beyond the big names also Fastmail, mailbox.org, Posteo, Mailo, IONOS, Strato, All-Inkl, Hetzner, Zoho and more. For most of them it fills in servers and ports itself; for some it only asks for the region. With All-Inkl you enter the server from your KAS yourself. Manual setup is the path for everything else, such as self-hosted servers.

Changing it later

If your password or a server changes, open Settings → Email Accounts, select the account and click Change IMAP/SMTP Settings. The window has its own connection test. If you leave a password field empty, the stored password is kept.

Typical failure patterns

Sign-in rejected although the password is right: Some providers require an app password once two-factor sign-in is active. Others (such as GMX and WEB.DE) want IMAP enabled in their webmail first.

Connection test goes nowhere: Server typo or wrong port. Compare the values character by character against the provider’s documentation. mail. instead of imap. is a classic.

Receiving works, sending fails: The SMTP part has its own details. Check whether the switch for the same credentials suits your provider. Some providers use different usernames or require “outgoing authentication” to be on.

More under Connection fails.

After setup

Check the folder mapping once: on some servers, Sent, Drafts or Trash have names YouniqMail cannot guess. The mapping decides where sent mail and deleted mail end up.