How can I suppress the Old Runlevel warning while installing Strongswan

When I install strongswan and dependent packages using apt install, I get the following warning prompt: This inhibits me from installing strongswan through an automated unattended install script. Therefore, how can I suppress this prompt. I am using Debian 9 Stretch (Version: 4.9.189-3+deb9u2) with kernel: 4.9.0-11-amd64. The APT version is v1.4.9 and strongswan I am…

Javamail: Email leaves successfully from program but is not delivered Windows Server 2012 r2

I am severely stuck on this problem. My program successfully delivers emails from my Windows 10 PC and Windows Server 2012 R2 Essential but sending it through any other Windows Server 2012 versions shows as successfully sent but the email is not delivered. Have tried all combinations of SSL/TLS/No authentication as well as all ports…