email bounced in MTA mode (failing for a long time(and retry time out not reached))

Question

hi i have XG430 (SFOS 17.5.14 MR-14-1), it is MTA mode, today i start getting bounced email while sending email to few domain 
 R=default_mx_router T=remote_smtp: all host for 'goldencedar-gmt.com' have been failing for a long time(and retry time out not reached) 
 can you please guide how to resolve this issue.

emmosophos · Answer

Hello Madni, 
 Thank you for contacting the Sophos Community. 
 I would first try to telnet to that host directly from the XG. 
 Then take a look at this KB . 
 Also please update the XG to a supported version (17.5 MR15 or MR16) 
 Regards,