Task 'arubanet.com - Sending' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).'
I just decided to try WG 5.2.2 again and installed it after having removed the previous (5.0.10) version. Now I am getting the above message while the mail stays in the outbox.
In the activity window I multiple instances of "NAT: TCP connection to xxx.xxx.xxx.xxx:25" from the clients. It looks like the requests are slowing the system down.
I am using ENS and have enabled the proxy servers using the standard ports and TR (transparant redirect). It is my understanding that the latter is required to maximize the benefits of the antivirus plugin.