Forum Discussion
Solved
Hybrid Exchange change of SMTP relay connector
Hi All So we have Hybrid Exchange environment, with few 2010 Exchange boxes on-prem, 1x Exchange 2016 on-prem (as the hybrid) and O365 tenant. Until now we were using one of the EX2010 boxes as ...
Whenever I setup a connector for this purpose on an Exchange 2016 Server, I always set the security tab options as follows;
I would definitely double and triple check your firewall rules too. Do you definitely have the Exchange Online IP's all allowed for the Exchange 2016 server?
THANK YOU!
That definitely did the trick, although now it looks like whoever created the send connector didnt do the work right - it is only relaying emails to internally and if try to send externally (ie: gmail) - nothing happens.
I can see there is a separate send connector for that 2016 box and another one which serves the on-prem (which obviously works fine at the moment). So, I am not sure how the 2016 send must looking.
Current config:
delivery:
Route via smart hosts (address of our securemx)
Smart host auth: NONE
Scoping:
Address Space - SMTP *
Source server: ADDRESS of the 2016 Exch box
Any help will be greatly appreacited!
Found the problem!
FW issue - someone forgot to fix the src ip masq and the requests were going with the default ext ip instead the dedicated one
Thanks for the help!