Mike Cu,

just to let you know, in this thread each one of the messages you sent ended up in the spam folder of my Gmail
account. Even after I marked the previous ones as "not spam". The e-mails from other people got into my indbox.
The report Gmail gave me was:

"It has a from address in yahoo.com but has failed yahoo.com's required tests for authentication. "

and linked to this explanation: https://support.google.com/mail/answer/1366858?hl=en&expand=5

I don't know why did this happen, but it might happen with other recipients using gmail.

regards
    Gabor