Upgrades to Ubuntu 18.0, SoGo gone

[casedup]

How can I reinstall SoGo? Tried looking on their website and it's all kind of complicated stuff about having a username and password there is no where to sign up for it at. How can I just get the new package available?

[iRedMail]

FYI https://docs.iredmail.org/upgrade.iredmail.1.6.0-1.6.1.html#sogo-new-yum-apt-repository-sites-new-gpg-signing-key