Hi!
Some days ago I have learned that e-mail messages containing "zymichost.com" are not sent from, and not delivered to, any yahoo-address.
What is wrong with this? They dont say why.

That's rather depressing, it's likely to be down to phishings sites being hosted on Zymic hosting (we delete them when we find them) and yahoo feel it neccessary to safeguard their users by filtering it from all messages.

Can't think of another explanation.