Please reference this post: https://community.sophos.com/products/unified-threat-management/astaroorg/f/68/t/59874
I am trying to only allow incoming SMTP Proxy connections from specific IP addresses. I tried sender_net_accept; however, it is not recognized. sender_net_reject seems to be recognized though. I haven't tried, but am looking at sender_net_reject_except = "ipblock1:ipblock2"
Can anyone familiar with Astaro's Exim installation verify whether this will work?