My mail address is:

Birgit Nietsch <NOSPAMbirgit-nietsch@gmx.de>

The address works as given and does not need any modifications.

Do not send attachments
unless you have my explicit consent.

Never send HTML mails,
I will delete them unread.

Advertisements are not welcome
unless I willingly ordered your newsletter.

Respectable business people will use Confirmed Opt-In for their newsletters. The first mail shall only inform about the subscription and ask for confirmation. It shall contain nothing else. Only if this is being replied with a clear "yes", you may start sending newsletters. Else: No.

I didn't answer your mail?
Then it might be possible that the global GMX filters have recognized your mail as spam, Please try it again, using a more significant subject line. Subjects like "Hello", "Urgent", "Help!" or "Please read!" are a bad idea...