When I'm trying to send an e-mail via S5 Quick Contact module I get the message below:
This is the IdeaMailServer program at host serwer1837838.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
<m...@p........pl>: 554 5.7.1 You are black-listed by recipient
However, it can be sent using the contact form in main menu.
Can you somehow help me with it?