Hello Paul,
I think you better move your question to the support cattegorie.
But now the problem:
Can you explain me some things? You have installed nethserver with owncloud and sogo or webtop is it right?
You wrote [quote=“pguerra, post:1, topic:4357”]
Is it possible for my server to know if it was being accessed from Mail.mydomain.com of cloud.mydomain.com??
[/quote]
Do you mean if it is possible to access webmail.mydomain.com for sogo/webtop and cloud.mydomain.com for mycloud on your server from a client?
So I think you have work with vhosts. Look at Scared to try to use NS and vhosts at posts 10 to 14.