1&1 suggests the use of IMAP over POP3.
The Account Name/User Name is your full 1&1 Mail Basic address. You created the Password during your E-mail account setup.
| Setting | IMAP | POP3 |
|---|---|---|
| Incoming Server | imap.1and1.co.uk | pop.1and1.co.uk |
| Port with SSL enabled | 993 | 995 |
| Outgoing Server (SMTP) | auth.smtp.1and1.co.uk | auth.smtp.1and1.co.uk |
| Outgoing port with TLS enabled | 587 | 587 |
| Outgoing server requires authentication (user name and password)? |
Yes | Yes |