As the page grows and peoples want to contact me, I added this page with different methods to contact me:
Best way is via IRC as user eche|on on the #i2p channel.
Second best way is direct via email.
As someone pointed out, I needed to add my PGP key: PGP-Key-ID: 0x4A9B1723
Hence that key is for my other email address email@example.com ! Currently I do not have a I2Pmail PGP key only setup.
And from now on I got a I2P messenger ID:
Copy that long destination ID as one line in your I2P messenger to add me as a contact.