Hi there,
I am new to this community, but I'm reading similar thread related to the error message that I'm facing now with my SMG 10.0.2. I wasn't able to connect to the device whenever I attempt to telnet to its port 25 and keeps getting this, 554 5.7.1 "You are not allowed to connect" error message. I haved tried the suggested solution from other thread but it doesn't help. I check the logs and doesn't show anything on why the connection was drop. One more funny thing is that I can see the SMTP banner when I check it from mxtoolbox.com but if I telnet the device from public network I can't connect and see the banner. I'm unable to telnet the device from inside, using the local IP. Emails are also flowing in. It's just that I cant access the mail server outside of the corporate LAN.
Hope you guys could help me as I'm trying to fixed this issue for quite sometime already. All the necessary records that I need is already inplace.
Thanks.
Mel