Markus Wild wrote:
This is not gray listing (it would say so if it were), that IP address did send SPAM to us, and got temporarily blacklisted for it. You can contact me privately to sort out the specifics (m.wild@cybernet.ch, or markus.wild1@swisscom.com, in order of preference).
Problem solved, but I forgot to say thanks to Markus for his valuable help. Thanks Markus.
/Per Jessen, Herrliberg