How the world was a lot nicer if : there was no spam, there was no war, there was no .....
Well, all you people thanks for listening and giving points in the right direction.
The error was not there, when sending me an e-mail, you get the delivery notification error that the domain does not exists. so last friday i found after four e-mails that my former hoster, who do control and maintain my ip to domainname (DNS) that 'someone' had change things although they did say at first that there was no changing..... )-:
Well, someone did actually change my MX record, resulting in a ip.name instead of an ip only or name only.
Finding that, restoring that, evrything works fine.
I must now send them a message that this may have been an small error (leaving a period in the line where it does not belong) but the consequences were severe.
Thanks to all for helping me out.
Anne.