Dear Sir and Madam,
You got mail from me ? sure ?
I totally agree with you, that Junk-Mails are not a joke.
You can be sure, that i do not send such messages.
In addition my provider has a firewall which blocks Junk-SMTP-traffic from his systems.
I'm not the originator of such messages.
The name of the domain 21o.de were abused as despatcher for junk-mails.
It's no problem to fake the origination address of a message,
so anybody else can "send" messages with my mail address.
You can see it in the header-information of the mail.
The receiving station shows the false sender-adress
and in case of incorrect information,
the real sender will be shown in brackets.
If you use the program thunderbird,
you can install the extensions "Country Lookup" (https://addons.mozilla.org/thunderbird/3595/).
It shows the origin country and city of an e-mail message, using the IP address.
With regret we see your trouble.