Hi,   I'm getting the following errors while sending emails to one particular domain.    ----- The following addresses had permanent fatal errors ----- <recipient email id>    ----- Transcript of session follows ----- 550 5.1.2 <recipient email id>... Host unknown (Name server: domain : no data known)   I can receive emails from that domain and otherwise I can send emails normally to all other email addresses with different domains. Please help ... View more