3
Guessing by your name you are from uk? If so phpmail should work fine with 1&1.
1. Did it work in the past? Is it a fresh website?
2.
here is a small php script that creates a form you can use to send a mail via phpmail. You can upload this to your webspace and send yourself a testmail with it to see if it only doesn´t work in XOOPS or in general
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