Thanks Maheshrojia for fast reply. I've already tried this before:
+ Changed retry interval
+ Updated to latest version SBG (we're using SBG version 9.0.1-10)
+ Under "SMTP Delivery Bindings" change the bindings for non-local and dynamically routed messages to "Auto"
+ Checked "Do not advertise 8BITMIME"
...but problem still persists
In addition, we still can send email to other domains, and domains which we cant send email to, still can receive email from other domains (I've tried to send email to them by using Gmail
, it's OK)
Thanks