Tried on Version V11.0.7 and Version V11.2.0 During VarAC Wednesday, the Email Gateway of WY6Y stopped forwarding messages and returned "VMAIL TO EMAIL GATEWAY WAS REJECTED AS WY6Y DOES NOT ALLOW YOU TO SEND" to some connection attempts and did nothing during a connection for others. WY6Y reported VarAC "suddenly started giving an error at the bottom of the screen. Saying “The Email Gateway is Inactive Due to Repeated Failed Attempts to Send Emails”." The cause of the problem was traced to an email address of HOTMAIL..com (i.e., dot dot com). VARACWEDNESDAY@gmail.com received dozens of duplicate emails. WY6Y reported "I just deleted the relay email from my parked folder and the Gateway Status box instanly became active again." An additional ramification is that this malformed email will be persistent in the dropdown of TO EMAIL: so N3JXB might send the same string the next time he checks-in. There does not seem to be a means to delete entries in this drop down. (N3JXB is aware of the problem, so he knows not to use the dropdown entry.)
Mark KB0US

Fixed. next version will includ that fix. on both ends
1, Better verification on the sending side that the Email address well structured..
On the gateway side It will alert you on the log until you resolve it but it will continue to deliver other Email and will stay green.
Thank you for reporting. problem simulated. I will fix that.