Problem
Last week I was testing the IMAP/SMTP connection of my Exchange 2013. Unexpectedly Outlook returned the following error:
The message does not appear
Sometimes it is neccesary to configure a network interface to listen on more than one IP (for example, web servers containing multiple SSL certificates…)
After
Due to some network infrastructure changes, the traffic passing through my internal FW (a Checkpoint VSX virtual system) started to suffer latency and packet loss.